What causes a GMC truck to turn over but not start?
If the engine starts up normally after doing that, it means that fuel pressure is bleeding off and the fuel pump needs to prime the lines before it can start. It can bleed off from one of two places. 1. Fuel pressure regulator has an internal leak, and fuel is bleeding off back to the tank though the return line. 2.
Is it time to panic about an ECM failure?
These ECM failure symptoms don’t necessarily mean that it’s time to panic. Oftentimes, the cause of the problem is an affordable sensor or a faulty wire. The only way to know for sure is to perform a thorough diagnosis. Some of the articles we’ve linked provide helpful advice on checking for the most common problems.
What to do if your Chevy Silverado won’t run?
During this period the ECU will be running the Oxygen Sensor Heater self-test, Air Injection System Passive Air test, EVAP Purge “No Flow” test, Misfire Detection. ACCELERATE: Turn off the air conditioner and rear defroster and begin driving your Silverado. As soon as possible apply half throttle until 55mph is reached.
Why does my ECM keep failing to ignite?
A rich fuel-to-air ratio can cause your engine to misfire, while a lean ratio can cause stuttering when it periodically fails to ignite. Similar problems can be caused directly by an improperly-adjusted engine timing. Either way, it’s possible that your ECM is causing the problem.
If the engine starts up normally after doing that, it means that fuel pressure is bleeding off and the fuel pump needs to prime the lines before it can start. It can bleed off from one of two places. 1. Fuel pressure regulator has an internal leak, and fuel is bleeding off back to the tank though the return line. 2.
What kind of car cranks but won’t start?
In this video we encounter a condition where a 2002 Chevy Silverado ( Similar to GMC Sierra ) pickup has a symptom of the engine cranks over but won’t start…. AboutPressCopyrightContact usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & SafetyHow YouTube worksTest new features
What kind of truck is a 2001 GMC Sierra?
I have a 2001 GMC Sierra 1500 SLT 5.3l that I bought used with only 80k miles on it. This truck starts then immediately stalls. Here is a list of things that I have replaced to no avail.
What causes engine to start then stall immediately?
It is very possible that has to relearn idle if everything was so off. IAC motors will cause this also and not set a code. If it runs with a little throttle, we may be in pretty good shape. Keep it running until it gets a little warm, then let off and see what happens. It may take a little bit to relearn.
In this video we encounter a condition where a 2002 Chevy Silverado ( Similar to GMC Sierra ) pickup has a symptom of the engine cranks over but won’t start…. AboutPressCopyrightContact usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & SafetyHow YouTube worksTest new features
I have a 2001 GMC Sierra 1500 SLT 5.3l that I bought used with only 80k miles on it. This truck starts then immediately stalls. Here is a list of things that I have replaced to no avail.
What causes a Chevy pickup to hard start?
If after you have circled the key a few time the engine starts normally then you now know for sure you have a fuel pressure leak down problem causing your hard start. If this video was helpful please help support my youtube channel by subscribing here: https://www.youtube.com/channel/UChCX…
Why does my car not start the first time?
Usually the engine will be slow to start the first time. Turn it off and it will start normally. sometimes will not start cold. There are two sensors one for the gauge and one to the computer that meters fuel to the injectors.
What should I do if my V10 engine won’t start?
Plus a check engine light with rich or lean codes ! It would help to have a scan tool hooked up to check data pid’s with a cold engine , if the intake air temp.sensor an coolant temp sensor are within 5 degrees of one another there is no problem with the temp. sensor. Could have a dirty MAF sensor also !
Can a Chevy Express run on no start?
The only thing was not checked was the wires. as the old wires where in pieces when i took them off. also i put in upper end plugs, but if i checked cyl 2, 4 , 6, 8, all had spark then i would assume i would get somthing rite… Yes I agree, 2 4 6 8 is enough to run, and yes I think it would run on spray, if it were only lacking injector pulse.
What causes the fuel pump to not start?
The fuel pump is running and delivering normal pressure to the engine But, with all that working your engine still will not start. So, the most likely cause, is that the fuel injectors are probably not opening. The (PCM) uses the trigger signal from the crankshaft position sensor; and/or camshaft position sensor to pulse the injectors.
What causes a car engine to not start?
All engines require three things to start and run: spark, fuel and compression. If any one of these is missing, your engine will not start. But with all that working your engine will not start. Engine Will Not Start-The most likely cause is that the fuel injectors are probably not opening.
How to troubleshoot a GM 4.3L no start?
Check that the 8 cylinders are getting spark with a spark tester. The distributor cap is good. The ignition coil is good. The ignition control module is good. The crankshaft position sensor is good. The distributor cap could be bad. The ignition coil to distributor cap high tension wire could be bad. The ignition coil could be bad.
Why does my Chevy Truck start and idle?
Not sure why this test caused a better and longer gas flow than the above test of just putting the ignition in the ON position and seeing how much gas comes out of the line before the fuel filter. Last test says to start the vehicle and remove the relay.
What kind of gas does a 1997 Chevy truck use?
1997 chevy c1500 WT with 4.3 . getting harder to re crank.. Only driveable with both stop revving to keep it going. And that still doesnt work well. Work ive done. New cap and rotor. Cleaned…. Exh gas.
Why is my truck not running when I leave work?
Truck wouldn’t stay running when leaving work today. It starts then dies after a couple of seconds. Had it towed to a friends where we pulled out the Chilton book and began troubleshooting.