Its a 99 Sierra 5.3
Ran fine beforehand. My brother recently ran the truck out of gas. We filled it it still wouldnt start. Turns out the ECM fuse blew. We replaced it, and the car ran horrible would stumble etc. I figured that what was in the tank bottom clogged the fuel filter, so I replaced it, no major change. I ran some Injector Cleaner, it fixed it pretty good. The only problem is on cold starts it takes a minute before the truck has power. I can give it gas and it wont go over 10mph and stumbles. I sea foamed it, and its running good except the cold starts. Anyone have any ideas? Thanks. Oh and no codes or stored codes.

 

How long has it been like this, my car freaked out when I blew the pcm fuse but after i replaced it and drove it for 45min, turned off the car for 30min she was back to good.

 

Oh its been a few days now. It runs great otherwise, except for the 'fuel gauge from hell" so common on these trucks. Thanks for the reply.

Maybe anyone know why the PCM fuse would blow when running out of gas?

 

Circuit protection. Loss of Resistence maybe, blow the fuse rather than the pump.

 

Usually those pumps go bad once you run them out of fuel. That's what I was told in class anyways. Id get that checked out.

 

I just dont think the pump can be bad, its running great now I mean I can floor it from 40 and it climbs to 90 like a champ.

 

not really..Ran my old car outtta gas 2 complete times on accident pump last another 40k.

 

Ran mine out of gas 45k ago and still running fine when my motor isnt blown

 

I had the same fuel gague problem too.. I finally ran mine out of gas and DID burn up the pump. When I changed it finally the gague works fine. as far as the performance problems since your mishap; try changing your fuel filter... there may be some trash collecting and after it runs it may be loosening up from the filter element and just sticking when you shut it off. That could explain the cold start power loss. Try it out. It could be an inexpensive fix and you could be back on the road good as new.

 

Off to the performance section ... it's a better fit than the Tuning section.