2005 Tahoe Ls stalling

[Bacon83]

Regulator is in the tank. But I connected a fuel gauge to the rail and it never cuts out. Even after it died I have 54 psi at the rail

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[TollKeeper]

Regulator is in the tank. But I connected a fuel gauge to the rail and it never cuts out. Even after it died I have 54 psi at the rail

Next time it dies, open the fuel cap, count to five, put it back on, and see if it starts. This doesnt mean the regulator is working, but if the fuel tank is over pressurizing, then the return may not be able to return to the tank from tank pressure.

(wow, thats a tongue twister)

 

[Bacon83]

I have tried that and it still doesn't restart

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[exp500]

Look at fuel trims, Should be about 10 percent. If they run 25 percent and up, change pump.

 

[Fless]

If you think the ECM might be getting heat soaked and causing the issue, get a can of computer air, remove the plastic cover on the ECM, turn the can upside-down and spray the ECM case in an attempt to cool it down.

 

[Bacon83]

I dont think it's the ecm at this point. I replaced it this morning and got the same result

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[exp500]

And check/test engine grounds, Battery Grounds.

 

[Sam Harris]

I dont think it's the ecm at this point. I replaced it this morning and got the same result

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Dammit

 

[PNWYukon]

I don't know if this applies to your situation or not.

Maybe swap the coil packs out and see if that helps anything, if you are having consistent misfires listed on your scanner.

 

[Bacon83]

Finally figured it out. It ended up being the ignition coil ground on the block

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[Sam Harris]

Nice! Glad you got it figured out!

 

[Matthew Jeschke]

Finally figured it out. It ended up being the ignition coil ground on the block

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dang good catch!

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[Pimpin]

Kudos...I've been silently following and hoping you'd figure it out. I am glad for you and will try and remember that if I ever need it for either myself or to help someone else. Thanks for letting us know all that was done and thank you to those ideas everyone gave. Darn good advice...

 

[Bacon83]

Quick tip on finding that wire. Just follow the battery negative cable to the block. It's attached to the same bolt. About 6 inch behind the power steering pump

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[Byoung1330]

Truck has about 280k on it. From a cold start it will run and drive for 20 minutes then stalls and won't restart. I've already changed the crank, cam, map, mass air, oil, and coolant sensors. Along with the fuel pump, fuel relay, ignition relay, and the ecm. Plus cleaned the throttle body. The truck has no check engine lights on. And at this point I'm completely lost. When it dies I have 54 psi at the rails. Throttle body is at 4% at idle and opens to 14% after it dies. Also showing pluse width on the injector. Any ideas please comment.

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Actually had a buddy that had this happen. His issue was the new crank sensor he installed was a dud. Installed another an problem fixed

 

[Logan5]

Truck stalled while driving today, luckily I got it into a park lot with momentum before I had to stop. Won't restart, no engine light. Nothing visibly wrong, cranks, won't start. Making some weird sounds like it half starts then immediately dies. Can't figure out so I call AAA. Waiting around for the tow and I start reading up. I find this thread. Ignition ground.... sounds easy to check. Crawl under the truck, find the ground, wiggle it with my finger and it pops right off.

Well then.

Grab my knife, strip a little wire, wrap it around the battery ground, zip tie it on, boom, starts right up. Drove it home, cancelled tow, did a proper repair of the wire, and all in time to make it to the bar for beers.