Changed fuel pump and float assymbly and starts up when cold but stalls out after 5 min or so.
Egr vac
SOURCE: 2000 chevy runs rough
fuel pressure regulator might b leaking .. pull vacuum line off of it and see if there is fuel.... if soo replace it
SOURCE: 1998 Chevy tahoe Hard to start when cold
Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.
SOURCE: 97 z71 vortec 5.7 replaced fuel pump.getting fuel but won't start
The # 5 cylinder is miss firing. not getting fuel. Could the injector just be stopped or the crankshaft sensor in gone.
SOURCE: 97 Chevy Tahoe is hard to start , problem is worse
This is just a guess- but I would try changing out the coolant temp sensor- this tells the computer that the engine is cold and needs a bit more fuel to start. If this is happening even when warm- look for a vacum leak.
SOURCE: Tahoe 97 Fuel problems
Crank sensor has to be bad,or the ignition module.Remove the ignition module and have it checked at the parts store.If it checks bad,replace it,if it checks good replace the cranksensor.The cam sensor,cranksesor,and the control module control injector pulse,and coil spark.I would point more to the ignition module.But I have known the crankshaft sensor to do this also.I hope this was helpful,if so,let us know,thanks,and good luck.
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