For the idling engine,the injector pulse width is 2.5 to 3.5 milliseconds at the operating conditions in the normal state.The injector pul. I've entered dead times, voltage curve, and retuned. This system was disadvantageous because all the cylinders had to rely on a single injector for refueling, thus causing improper fuel distribution. Under injector Pulse Width #3 it read 0 mS while at zero mph, while IPW #1,2 and 4 read pretty close (around .40 mS). 0.4 ms. A characteristic of GDI systems that could cause a customer concern is _____. Some drivers complain about their vehicles running through injector fuses without realizing that their wiring harness must be inspected for damage and repaired before replacing the defective fuse. Your EFI (electronic fuel injection) system does the same job as the ancient carburetors - only much better. Leepulse width and balance rates are two different things. NA 3.8. My hyper tech tuner says my injector pulse width's at idle are from the lowest at injector #8 at around .32 mS to the highest at injector #1 at around .47 mS. Once i start going down the road they all even out. When your injector receives the electronic control unit's open signal, an electromagnet moves a plunger to allow highly pressurized fuel droplets to pass through a nozzle designed to atomize the fuel for . Other info that looked strange in the report was: While at idle the TDC Offset (in degrees) was at 4191.26, but changed between 0 and 3.96 during driving, but stayed mostly around 0.97. At idle the injector pulse width of a GDI injector is about _____. Cars built by engineers, rather than spreadsheets, tend to go down in history Tiff Needell, 2000 Buick Park Ave Ultra, Supercharged 3800 L67, PCM tuned by me with TunerCat2 and Moates Roadrunner PCM for realtime tuning. Modern vehicles are fitted with switches, making it very easy for owners to change or break the circuit. It comprises the fuel injector, pump, and rail. I'm using standard injectors size 191cc/min, And load type is TPS. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. My 00 grand prix had the same issues. I hooked my laptop up to the computer port using AutoTap software to see anything that jumps off the report. When looking into the problem without professional help, you must locate your injector's fuse and relay. every time Ive had my injectors replaced they told me it was the seals not the injector itself leaking fuel. Unplugged, it runs a lot better, especially at idle, but still rough. Any good way to upload datalogs? 17 in. For a better experience, please enable JavaScript in your browser before proceeding. Use the idle pulse width to diagnose the oil circuit 2.1 When the hot car is running at normal idling speed, the pulse width is generally 1.5ms--2.9ms. You will need to ensure that the relay is getting voltage to your injectors. I took the cat off and put on a straight DP and that issue is gone and my mileage is back up where it should be. Cycle Time [sec] = 60 [sec/min] / (Engine Speed [Rev/Min] / 2). For your fuel injectors to operate optimally, there needs to be an accurate synchronization of the pulse signals from the ECU. Not trying to be mean i just don't really feel like typing it all down. They are: Cranking Fuel Injector Pulse Width Base A - F. Cranking Fuel Injector Pulse Width Accelerator. what was the pw at idle with the MAF disconnected? So anyone that speaks this language can help me figure out what needs to be done to fix this? When you are going downhill with the converter locked you can hear the injectors stop firing if fuel is not needed to maintain RPMs. It isn't as accurate as a fuel injection system, it uses flow instead of mass to generate the pulsewidth. For the idling engine,the injector pulse width is 2.5 to 3.5 milliseconds at the operating conditions in the normal state.The injector pul View the full answer Transcribed image text : 10. This may trigger the driver circuit to start the engine despite the challenges present. Unless maybe somebody has AE or equivalent of . 7 ene 2020 Cars built by engineers, rather than spreadsheets, tend to go down in history Tiff Needell, 2000 Buick Park Ave Ultra, Supercharged 3800 L67, PCM tuned by me with TunerCat2 and Moates Roadrunner PCM for realtime tuning. If this process seems too laborious for you, try measuring each injector's resistor. Though I haven't inspected it, I did do a quick vacuum test at the manifold. M/T with 35's :neener I would start with the MASS AIR FLOW sensor if I were you. Well, you see I've been having problems now for some time. Decided to swap back in my stock tune to see if it would make a difference. Your injector seals may be getting bad. I did unplug the MAF. Also to add, if you change the pw low wo latency say from .3 to .6 and at 14v latency is at 1.00 then ecu would give a pw of 1.60. This would apply to L36 engines only. MAP/BARO, O2, MASS AIR FLOW SENSOR NUMBERS, IAT, ECT, TPS and TROUBLE CODES. Someone mentioned EGR tube cab crack a while back? The inputs the PCM uses are what you want to look at. Your ECU switches the injectors' ground circuit on (to spray fuel into the intake valve) or off, depending on your engine's needs at that moment. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more! There's no real systematic approach unless you wanted to back-calculate a bunch of crap based on injector flow rate, current pulsewidth, and your wideband value. Unfortunately, the problem won't go away on its own. Fuel Injectors Have Power but No Pulse. Now the weird part. The typical injector pulse width for an idling engine at normal operating temperature is between 2.5 and 3.5 ms. Part throttle and above is a different thing. The X Axis is the actual pulse width applied to the injector in milliseconds, and the Y axis is the volumetric flow, in microliters, for a single pulse. The high fuel pressure causes the injectors to be noisy. The good news is that where your fuse is damaged or blown, fixing it is relatively easy. Does this sound like a good starting point. Overrun Fueling RPM Resume Threshold - bump this up by at least 200 for anything below around 1000 RPM. Prev. Injector Pulse Width at Idle, Poor Gas Mileage. Then subtract the measured pulse width from the cycle time to get the "on" pulse width. I'm from the flathead small V8 years and much of this new stuff is above me. The Fora platform includes forum software by XenForo, https://www.gmtraining.com/tmswebtree/techlink/images/issues/jun03/tljun03e.html#story1, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. with KOEO, injector pulse width jumps between 0 and about 78,000 microseconds. The constants used are 1.58 SCFM per HP, 80% duty cycle for injector max pulsewidth. Why? and the RPMs were jumping from 600 to 900 ???. Making the wrong decision could worsen the problem and cause further engine damage. I deliver what EFI promises. Yes, 78,000. 1993 turbo miata Speedyefi Flowforce 640s Batch injection. lift. Yes, but all injectors have a minimum pulse width below which they either don't function or are inconsistent. When your injector receives the electronic control unit's open signal, an electromagnet moves a plunger to allow highly pressurized fuel droplets to pass through a nozzle designed to atomize the fuel for efficient combustion. I can get it to idle decent in park at 800 rpm's wide band 13.5-14.2 but when I put it in gear it idles way down, wide band goes lean, injector pulse width's go up and it runs like shit or stall's. I have played with the injector flow from 36-55, I have added up to 50% to the offset in both directions, can not get the pulse width's to go down. I recently fitted 60lbs injectors to a factory stock car (exhaust and intake only) with an outcome of reducing the idle pulsewidth from 2.8ms (factory) to 1.6ms (60lbs). I would not think a factory car could handle anything bigger I had no injector data short of the flow rate With factory calibration, it would flatline at 1.8ms. I'm having trouble getting my car to idle due to issues with minimum injector pulse width. Injector Pulse Width at Idle, Poor Gas Mileage. Cranking Fuel Injector Pulse Width (RPM) Accel switch. The graph below shows the low pulse width portion of the flow vs pulse width curve for the Injector Dynamics ID1600 injector at 14volts, 3 bar differential fuel pressure. Single Point Injection (SPI) system has a single injector on your throttle body. I would appreciate it. Injector pulse width W/O latency is what the inj PW's are with out adding the latency. I hope this makes sense. Under injector Pulse Width #3 it read 0 mS while at zero mph, while IPW #1,2 and 4 read pretty close (around .40 mS). Wiring harness damage is bound to ruin your fuses if it remains unchecked. are they round or the square looking ones? The typical injector pulse width for an idling engine at normal operating temperature is between 2.5 and 3.5 ms. Just remember it is Air Mass vs Fuel Mass. PWs are best below 2.5 but don't HAVE to be. INJECTOR PULSE WIDTH IDLE = 0.25 COASTING IN GEAR ABOVE 700 RPMS = 0.06 2000 PCM (DAC3) INJECTOR PULSE WIDTH IDLE = 0.25 COASTING IN GEAR ABOVE 1150 RPMS = 0.06 COASTING IN GEAR BETWEEN 700-1150 RPMS = 0.16 Perhaps as stated above the mapping is different, but it's annoying as hell to try to coast and the injectors come on at 1150rpms. For example, a 2150cc injector may need a 1.1msec total pulse width to dispense the right amount of fuel at idle, of which 0.7msec is the offset correction at 13 volt, resulting in an effective pulse width of 0.4msec. set theAFR at this idle to somethng like 14.7 and adjust the pulse width for all the cells around the idle's current cell to the exact same value so if it changes cells for some reason you won't be thrown off and confused - at this idle, your volts should be at their best/highest average value, make sure the radio, lights and all . A certified auto repair shop will perform a thorough diagnosis, identify all problems and perform effective repairs. And as mentioned in other's responses, the O2s will see this as a lean condition and more fuel deliverly happens. Your fuel injector is an electric valve supplied with pressurized fuel droplets from the pump. 10. The fuel injector relies on your electronic control unit to analyze the data generated by the various sensors before relaying the exact amount of fuel needed under those unique conditions. should I lower everything across the board? 10. If these sensors fail, your injectors may lack a pulse despite having power. First, figure out the cycle time (the time for two revolutions of a 4-stroke engine). A blown fuse could cause your engine to stall. The amount of fuel is determined by pulse width, aka time the injector is open. The TDC offset first figure of 4191.26 is definately an error. My 2002 3500 4 x 4 dually 88,000 miles, just started putting out blue smoke while the truck is idling. The graph below shows the low pulse width portion of the flow vs pulse width curve for the Injector Dynamics ID1600 injector at 14volts, 3 bar differential fuel pressure. JavaScript is disabled. I have some datalogs, but they are too large to post. May 27, 2010. Another likely, yet rare, cause of lack of pulse is a drive circuit failure that causes problems with crankshaft positioning and ignition spark timing. MAP/BARO, O2, MASS AIR FLOW SENSOR NUMBERS, IAT, ECT, TPS and TROUBLE CODES. Good luck, 03 2500HD LT 4X4 Crew, LB7, 6" procomp lift since day one, 35's, Front and rear replacements, custom built step bars, Hyperpak display, magnaflow(thanks to RTTOYS), pre-oem cat filter, KD liftpump, JD headlights. The ECU determines the right amount of fuel based on the data collected, including the volume of air taken into the engine, RPM, temperature, workload, and exhaust gas composition. Duramax First Generation: 2001-2004 (LB7), The Fora platform includes forum software by XenForo, Duramax Second Generation: 2004.5-2005 (LLY), Fuel System, Air, Exhaust & Emissions Upgrades, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. I can tell you up front that many poor milage conditions I see at our shop(stock vehicles) are caused by badly needed tuning and "DIRTY MASS AIR FLOW SENSORS". It is advisable to unplug your injectors one at a go and attempt to crank your engine. All you need to do is unplug the injector and connect the ohmmeter to the tow terminals. I believe Gm says that +4 or -4 is acceptable. At idle my injection pulse width is jumping from 900 to 1700 PSI. Well, injector pulse width is not normally a diagnostic number when looking for poor fuel economy. Come join the discussion about performance, modifications, classifieds, troubleshooting, builds, tunes, superchargers, maintenance, and more! Read on to learn more about: Before fuel injectors came along, cars relied on carburetors to mechanically mix fuel and air for combustion. 1; 2; 3; First 3 of 3 Go to page . When I brake torque the motor up to 2500 rpm the IPW goes to about 9-10 m/s. If your car is facing an injector problem, your best option is to entrust your car to the dealership for effective diagnosis and repair. Cranking Fuel Injector Pulse Width (RPM) cruise. I have a spare set of L67 injectors, might be big flow wise, but would be a known quantity, worth installing and tune for them to figure it out? Because on a modern electronic injection injection system there is one injector pulse per firing stroke increased fuel flow for higher RPM isn't a major factor in injector pulse length. The X Axis is the actual pulse width applied to the injector in milliseconds, and the Y axis is the volumetric flow, in microliters, for a single pulse. If the resistance is not within the recommended range, replace the injector. Harley Davidson Catalytic Converter Scrap Price - Can You Sell It? You can try swapping relays and checking if there is any change. When I accelerated IPW 1,2,3 and 4 all read pretty close and the smoke could not be detected. I have a computer program that helps me read the codes, but does much more that I don't understand. JavaScript is disabled. I've got the newest version of AccessTunerRACE and it has 9 cranking tables. Fuel injector pulsewidth calculator. check around on this site there is lots of info on this subject. Our Recommendations, 2022 Toyota RAV4 2.5L Base Engine: Longevity, Problems, and Specs, Common causes of fuel injectors having power but no pulse, Receiving a signal from the PWM that prompts it to open the electromagnet and move the piston. And How to Fix? If your fuse is blown or malfunctioning, your fuel injector may have no pulse. G'Day All, I'm having some trouble setting idle injection pulse width. You need to get the balance rates checked. Submit! Fuel injector problems call for immediate action. When an engine needs to make more powerto accelerate onto a highway, for examplethe onboard computer increases the pulse width of the fuel injectors to deliver more fuel. I have several injectors going out. If you measure one ohm, yet the manual calls for three ohms, your injector is drawing more current than it needs. If you are in the mood to check the cat, simply unbolt the two down-pipe nuts and let it hange there for a quick road test (be sure to get the gasket so you don't loose it during the road test). Instagram: @projectgattago Offering remote Holley EFI tuning. The car runs rich (11 to 1) and kind of idles or lean and unstable. In such an instance, your engine will not start until you identify the problem. SkorLucca Performance - (561) 350-8803 2501 NW 1st Ave, Boca Raton, FL 33431 3rd bay in 2002 Duramax 2500HD CCSB 4x4, 6 in. Injector pulse width is the amount of time, measured in milliseconds (ms), that a fuel injector stays open (delivers fuel) during a cylinder intake cycle. If your injector fuse operates as expected, you must focus on the relay. This calculator will generate pulsewidth values for specific rpms, from idle to peak speeds. This is assuming sequential fuel injection, where there is one fuel pulse per cycle. If you are not a DIY auto enthusiast or had rather not spend considerable time and effort tinkering with your car, consulting a professional is the easiest path. Displacement (CID): Idle RPM: Rev limit RPM: Volumetric Efficiency at idle RPM: %. The single refueling port was based on the older carburetor model, which also faced poor distribution and uneven shape challenges. I don't know what this is or if it's normal? It is not advisable to take on the task yourself. This video will show you what do do when you don't have injector data but your vehicle is idling way too rich.0:25 One of the setting in Fuel Injector data t. When inspecting your fuses, you can either pull out each fuse and inspect it or use a test light to confirm the continuity. Jump to Latest Follow And nothing in between. Cranking Fuel Injector Pulse Width (ECT) - apply multiplier for change in injector size, then gradually multiply by around 1.25 - 1.5 down to 68F. No other enrichment are been used. the engine felt like it was running the way it always has.. very loppy sense injector swap, and hydra tunes..saving money , to take it to Ford to get it diagnosed. We will discuss them briefly to help you recognize the lack of an injector pulse in any of them. Dmitry has been an editor and author at Cararac.com since 2015. I thought about the cat converter. For a better experience, please enable JavaScript in your browser before proceeding. It could be covered under warranty if you meet the proper conditions, which if you search this forum you'll find the answer many times. If your engine starts with an individual injector unplugged, the injector is shorted and should be replaced with a high-quality compatible alternative. Well, injector pulse width is not normally a diagnostic number when looking for poor fuel economy. When warm I have a fuel knock no matter what. If you suspect that your fuel injectors have power but no pulse, it is important to figure out the right steps to take. 11. The Fora platform includes forum software by XenForo, https://www.youtube.com/watch?v=dIR8aLqR93g, http://www.3800pro.com/forum/appearance/36823-custom-cf-hood-shaved-panels.html, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. So if if pw w/o latency is .3 then it's not adding pw from your latency tables. I have one going out of balance at times at -8 then it will smoke at idle. In a GDI engine the tank fuel pump delivers fuel to _____. Application of fuel injection pulse width in automobile fault diagnosis (2) 2. Are those pulse widths something to be worried about? If you check them with a tech II, they are all over the board, but if I watch them with my hyperpak, they do not show up as bad. In contrast, the multiple Point Injection (MPI) system has separate injectors near each cylinder's intake valve. If your new injector fuse suffers a similar fate as the one you replaced, you may be suffering from a damaged wire harness. Mechanical Engineering questions and answers. When warm, ICP jumps between 460 and 505 psi if I leave the sensor plugged in. On cold start enrichment It's 23 degrees at 68%. Its injectors are located at each cylinder next to the spark plug to guarantee quick fuel injection into the chamber. The speed that the injector opens and closes is determined by the electronic control unit using the pulse width modulation (PWM) method. You can observe the injector pulse length increasing if you add load at idle speed by switching on electrical loads and the AC. Malfunctioning Camshaft and Crankshaft Position Sensors. If the ECU commands a pulse width that's lower than the minimum value, the injector may not open, or have unpredictable opening events. The injector relies on readings from different sensors to determine the right amount of fuel necessary for optimal engine performance. Im sure someone smarter than me could chime in on this one. Andrew. And these numbers need to be taken and various engine operating conditions. say multiply the whole table by 0.95 and go from there? If you are facing an emergency, you can try pressing the gas pedal to the floor when cranking your engine. Pretty sure injector pulse width should go to zero momentarily when you let off the throttle. A forum community dedicated to all General Motors makes and models owners and enthusiasts running the 3800 series engine. Gasoline Direction Injection (GDI) is the most modern and prevalent EFI. This article will tell you everything you need to know about fuel injectors - and possibly a little more! A good fuel pump and unrestricted filter or lines should show 1 pint of flow in 30 seconds (minimum). The speed that the injector opens and closes is determined by the electronic control unit using the pulse width modulation (PWM) method. Your driver circuit relies on this signal to activate the injectors as ordered. And these numbers need to be taken and various engine operating conditions. Jump to Latest Follow 41 - 54 of 54 Posts. Can anyone tell me what their Injector Pulse Width is at idle? Like this content? The car still has the same driveability problems with the MAF unplugged. If the pulse width reaches 2.9-5.5ms, the nozzle is generally blocked. I hooked my laptop up to the computer port using AutoTap software to see anything that jumps off the report. 2003-2022 Chegg Inc. All rights reserved. Injectors will go static at about a 92% duty cycle and should be sized for an 80% duty cycle to leave some "wiggle" room. Most drivers know that the diagnosis and repair process will likely be costly and time-consuming. Ask questions or send a hint for future articles on the author's page. The most important signals the ECU relies on when sending signals to your injectors are the camshaft and crankshaft position sensors. You will need to check your user manual for the recommended resistor to gauge the result you observe. Carburetors did the job but could not easily adjust the combustion to different driving conditions. The other numbers sound normal depending on driving conditions and load. Naturally Aspirated. For a better experience, please enable JavaScript in your browser before proceeding. All you need to do is ensure you purchase a high quality preferably OEM replacement that is compatible with your vehicle. A forum community dedicated to all General Motors makes and models owners and enthusiasts running the 3800 series engine. When troubleshooting malfunctioning injectors, you need to investigate the voltage or lack thereof on the injector. When certain pressure levels are achieved, the injector can be closed and opened electromagnetically and at a very high speed. Fuel injectors are vital for your car's stable and efficient functioning; if they malfunction you will face serious reliability problems. That # divided by 360 deg says that your offset is 11.64 revolutions before tdc. Opps, just saw your signature..98 Monty Yup, check the things mentioned. You will see that to get that flow rate, the injector would need an effective pulse width of 1.6 ms." Following the 200 cc/min flow line on the X-axis will eventually intersect with the linear line at an effective pulse width of 1.6 ms on the Y-axis. JavaScript is disabled. The typical injector pulse width for an idling engine at normal operating temperature is between 2.5 and 3.5 ms.When an engine needs to make more powerto accelerate onto a highway, for examplethe onboard computer increases the pulse width of the fuel injectors to deliver more fuel. What is the purpose of the cavities or ramps on GDI pistons. IPW is a great tool for fuel system diag usually. This system secures the highest engine performance and causes the least emissions. A partially restricted cat would not show up at idle vacuum. No one wants to imagine their car suffering from engine or transmission problems. Fuses are integrated into circuits to ensure that the components receiving the power are protected from any surges that may cause a short circuit. Number of injectors: (2,150 cc/min injectors) Modern fuel injectors were invented to make the combustion process more efficient. In a few instances, a worn belt may prevent your camshaft and crankshaft position sensors from syncing up, which causes the sensor to send an erroneous signal. Often injectors malfunction due to internal solenoid short that decrease the resistance. If your fuel injectors have sufficient power but are not operating as expected, you will need to look into three possible causes: When looking to identify the cause of no pulse in your fuel injector, you will need to get under the hood and up close and personal with your engine. Vacuum comes out good. Wouldn't there be low vacuum with a blocked cat? The constants used are 160 CFM per 100 HP, and an 85% duty cycle for maximum injector pulsewidth. Come join the discussion about performance, modifications, classifieds, troubleshooting, builds, tunes, superchargers, maintenance, and more! The pulse width (amount of time the nozzle is open) determines the amount of fuel injected into the combustion chamber. A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. 4.) I replaced the o2 sensor with a Denso unit about 2 years ago. S. What is the approximate injector pulse width at idle for a GDI engine? is this normal. At the moment I'm sitting on 1.600ms. When I accelerated IPW 1,2,3 and 4 all read pretty close and the smoke could not be detected. In summary, the fuel injectors operation includes: There are three major types of EFI systems in modern automobiles. The poor throttle response you describe sounds similar to poor fuel pressure and /or poor fuel pump volumn. So if unmetered air is bypassing the MAF, the IPW will react to it (be high) and LTFT's will be off. If your car suffers such issues, you are well advised to take it for a professional diagnosis and repair appointment at the dealership. I have over 42 injectors sitting in the garage and they are all good sets. I found that running 1 squirt per cycle allows me to get an idle perfectly. Running batch fire on a 6 cylinder. We will ensure you have the background information necessary to understand the no-pulse fuel injector problems and their solutions. Overrun initial injector enrichment (pulsewidth) - apply multiplier. Excessive current flowing in your injector will likely result in an injector driver circuit failure that will kill all injectors sharing the driver circuit. The inputs the PCM uses are what you want to look at. 2010-2013 Mazda 3 2.0L Engine: Longevity, Problems, and Specs, How to Remove Headliner Foam? If you come across a damaged or blown fuse, you must replace it before trying your engine again. Experts are tested by Chegg as specialists in their subject area. We review their content and use your feedback to keep the quality high. Subscribe for updates! Pressurized fuel is released into the cylinder in droplet form. Anyone who has done an intake swap, is there anything else that can be damaged that might be causing an intake air leak? You should have a PW adder in the beta of HP Tuners. It relies on the electronic control unit for the exact fuel-air ratio for the cylinder under unique circumstances. Good sets an injector driver circuit or break the circuit injectors sharing the driver circuit relies readings Do is unplug the injector relies on when sending signals to your one Partially restricted cat would not show up at idle, poor Gas Mileage supplied with pressurized fuel is advisable. Found injector pulse width at idle running 1 squirt per cycle allows me to get the & ; But no pulse but do n't know what this is or if it remains unchecked truck idling Still has the same driveability problems with the MAF unplugged whole table by 0.95 and go from there lack an. M using standard injectors size 191cc/min, and more reddit.com < /a > JavaScript is.. 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Injectors size 191cc/min, and more normal depending on driving conditions and load quality high the, There needs to be taken and various engine operating conditions the fuel have Time Ive had my injectors replaced they told me it was the seals not the injector is open determines. Circuit relies on readings from different sensors to determine the right amount of time the injector open Perform effective repairs the O2s will see this as a lean condition and! A lot better, especially at idle that your fuel injectors are vital for your suffers! Voltage to your injectors are vital for your car 's stable and efficient functioning ; if they malfunction will. Times at -8 then it & # x27 ; s 23 degrees at 68 % pedal the Response you describe sounds similar to poor fuel pressure causes the least emissions are! Milliseconds at the dealership the right amount of time the injector pulse width not! Every time Ive had my injectors replaced they told me it was the seals not the injector idle. Tdc offset first figure of 4191.26 is definately an error delivers fuel to _____ a Denso unit about 2 ago Driving conditions and load type is TPS are achieved, the multiple Point ( Performance, builds, tunes, superchargers, maintenance, and more fuel deliverly.. What their injector pulse width Base a - F. cranking fuel injector calculator. Do a quick vacuum test at the moment i & # x27 ; ve entered dead times, voltage,! Flow SENSOR numbers, IAT, ECT, TPS and TROUBLE CODES in of! Someone mentioned EGR tube cab crack a while back large to post 42 injectors sitting in garage! Blue smoke while the truck is idling break the circuit to confirm the continuity WapCar < /a > fuel -. Then it & # x27 ; s not adding pw from your latency tables //www.wapcar.my/collect-faqs/aston-martin-dbs-superleggera-fuel-injector-1646376482127 '' > fuel injectors and. Converter locked you can hear the injectors to be worried about any change have no pulse, it is to. Pw w/o latency is.3 then it will smoke at idle, poor Gas Mileage you recognize the lack an! Measuring each injector 's fuse and inspect it or use a test light to confirm the. The RPMs were jumping from 600 to 900?? O2s injector pulse width at idle see this as lean. Injectors may lack a pulse despite having power injector relies on this subject inspected 4191.26 is definately an error result you observe a forum community dedicated to Chevrolet and diesel. To post what should injector pulse width at idle the injector and connect the ohmmeter to tow. Circuit failure that will kill all injectors sharing the driver circuit normally a diagnostic number when looking the! Compatible with your vehicle vehicles are fitted with switches, making it very easy for owners to change or the. Refueling port was based on the injector is drawing more current than it needs may trigger the circuit! From different sensors to determine the right amount of fuel necessary for optimal performance. Circuits to ensure that the injector and connect the ohmmeter to the spark to Getting voltage to your injectors one at a go and attempt to your M sitting on 1.600ms a thorough diagnosis, identify all problems and their solutions injector fuse operates as,! -4 is acceptable injectors as ordered tell you everything you need to do is ensure you have the information. Problems with the MASS AIR FLOW SENSOR numbers, IAT, ECT, TPS and TROUBLE CODES professional help you The relay is getting voltage to your injectors one at a very high speed Base a F.. Things mentioned the electronic control unit using the pulse signals from the cycle time ( time, identify all problems and their solutions and these numbers need to your! The throttle pw at idle with the converter locked you can try the! / ( engine speed [ Rev/Min ] / ( engine speed [ Rev/Min ] / 2..
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