doctorsevarg

Looking for some assistance. My 1997 sub 5.7 starts and generally runs fine when cold. However, after driving it awhile and getting it to normal operating temperature I can shut it off and then it won't restart warm. If I hold accelerator to the floor, it will start but run crappy for awhile, almost as if it's getting too much fuel, hence poor spark somewhere. I have replaced the distributor, distributor cap and rotor due to a previous issue with moisture getting in the cap and eventually corroding it. Thought this was again the issue, but after replacing the whole distributor asssembly, it didn't cure the problem. Plugs and wires are about 4 years old. Any ideas?

oldchevy

Have you taken out the plugs to check them? 4 years is a long time to go with a set of plugs. They should at least be checked, cleaned and regapped. Probably should be replaced along with the wires.

in2pro

I'd suggest checking the fuel pressure... it could be the pump draining back or not pumping well after it warms up...
pressure needs to be above 55psi, 60 is better and it should be steady and should not bleed down too quick after engine shut off...

doctorsevarg

Thank you all for your help. As a follow up to this, I replaced plugs, wires and had fuel pressure checked. I gave up and took the vehicle to my mechanic and he found that a temperature sensor was corroded and in result was telling the computer that the engine was running at twenty some degrees F. Therefore it was giving it too much fuel.

BW56

Any more info the temp sensor? Where its located and cost?