Why is my GMC 7500 diesel engine not starting?
Since you have a 3126, I believe your fuel pressure regulator is faulty. I have seen this many times before. The regulator is located on the back of the head. When the fail, they allow fuel to leak out of the head and cause the engine not to start. Your engine needs 25 psi to start. If your engine has a hand primer pump, you can prime it up.
What kind of engine does a GMC 7500 have?
GMC 7500 with a 3126… GMC 7500 with a 3126 Diesel won’t start. Turn off to go to lunch on hour later,cranks but will not start. Submitted: 9 years ago. Category: Heavy Equipment Experience: 23 Years Caterpillar Engine experience. Hi. Thanks for using JA! I will try and help you out. Could you get me your engine serial number please?
What does Flash code 55 mean on GMC 7500?
Flash Code 55 indicates that No Detected Faults have occurred since the ignition key switch has been turned to the ON position. If you get a 2 digit code, I can tell you what it means and how to fix it.
Why is my cat C7 engine not starting?
C7 engines have problems with the fuel pressure regulator not maintaining enough fuel pressure especially when cranking. You may want to make sure you are not sucking air.
What are the cranks on a 2006 cat C7?
2006 cat c7 cranks but… 2006 cat c7 cranks but no start unless u give it either, truck has new ipr and heui pump and sensor, trucks builds 1700 psi on scanner while cranking and shows 180 rpm while cranking and building fuel pressure but will not start Experience: 23 Years Caterpillar Engine experience. Hi. Thanks for using JA!
Why does my GM car say no start no crank?
How to diagnose a no start no click on GM vehicle. If you have a late model GM vehicle and turn the key only to hear nothing, you’ll most likely think you have a dead battery—and you may. But a no start, no crank, no click condition can be far more involved than that.
Why does my cat engine won’t start?
Cat Engine Won’t Start Troubleshooting. Diesel Engine Crank No Start. – YouTube Cat Engine Won’t Start Troubleshooting. Diesel Engine Crank No Start. If playback doesn’t begin shortly, try restarting your device.
How to troubleshoot cat fuel systems and test diesel?
– YouTube How To Troubleshoot Cat Fuel Systems and Test Diesel Engine Fuel Pressure. If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.
Why does my fuel pump cut off while driving?
Ended up being a faulty crank position sensor. Its used to fire right back up. But now when it shuts off it does not crank back at all. Also whenever you turn the key to on the fuel pump doesn’t cut on. But everything else will work. Check to see if you have spark and fuel pressure.
Why does my truck engine not start when I replace the ECM?
NOTE: A new ECM comes with an unprogrammed Personality Module in it. If the ECM has been replaced, the ECM WILL NOT COMMUNICATE and the ENGINE WILL NOT START until the integral Personality Module has had software flashed into it. 4.
What kind of engine does a cat 3126 have?
I have a 3126 in a 2004 Ford that was running fine when I parked it. Tried to start it after is sat for a couple of weeks. The engine cranks like it should but makes no signs of starting.
Is there any warranty on Cat 3126 cranks?
The diagrams I have seen don’t look exactly like my configuration. No warranty! Any thoughts?
What causes a truck engine to not start?
If the ECM has been replaced, the ECM WILL NOT COMMUNICATE and the ENGINE WILL NOT START until the integral Personality Module has had software flashed into it. 4. No Speed/Timing Signal: a.
What to do if your Chevy 1500 won’t start?
The passlock sensor voltage reading has changed & you can relearn it to the PCM & you can start the truck again. To relearn, turn the ignition key to the on position for 3 10 minute cycles, turning the key to the off position for 5 seconds after each 10 minute learn.
How to troubleshoot a no start GM 4.3L pick up?
Testing a Cranks but Does Not Start condition on your GM 4.3L, 5.0L, 5.7L pick up, van or SUV is not that hard to do, if you have a solid diagnostic strategy. In this article I’ll show you the basics of testing such a problem.
Why does my GMC Yukon engine not start?
GMC Yukon: Engine Cranks → Won’t Start There are a lot of issues that can cause your Yukon to crank, but not start. The engine needs air, fuel, and a spark in order to run. It is highly likely that if the engine is cranking, but not starting that it has thrown an OBDII code.
Why does my car not start when I Turn on the ignition?
One possible reason your car wont start is a bad connection. This is one of those things that is often over looked until after the battery or starter or alternator have been replaced or all of the above. if this happens to you check your battery connections. Loading…
What to do if your Chevy C5500 wont start?
If the circuit between pins 9 and 69 have no continuity,then the TCM has been damaged/shorted from some sort of external source shorting to the heatsink of the TCM. 1. Inspect for the source that shorted the TCM heatsink. 2. Eliminate or repair the source or condition that caused the damage.
Why does my GMC Sierra 1500 not start?
Happened before, I gave it air, it started, thought bad filters, then noticed no umph in acceleration, leads me fuel line or bad plugs, not burning fuel. Checked carb, It’s not wet this time, leads me to fuel.
What to do if your GMC Yukon Denali won’t start?
48 people found this helpful. I have a 2000 Gmc Yukon denali, 5.7 litter, it cranks but won’t start it does have spark in coil, but No spark in #1 sparplug I put new distributor and new coil new sparplugs, new plug wires,checked out fuses there all good]