Chevy truck runs fine till it gets warm then starts shutting dowm

Asked by Skipscrypt Aug 17, 2017 at 08:35 PM

Question type: Maintenance & Repair

1997 chevy c1500 WT with 4.3 .
This truck is killing me...over past 3 months it
started dieing randomly more and more often.each
time worse than last.it will shut down and crank
back up but run like crap till it cools off..as of now
it is at its best idle (all the work ive done)ever.till it
gets to running temp where it goes to crap chokes
down repeatedly only running a few seconds.and
getting harder to re crank.. Only driveable with both
feet..brake and gas and shifting to nutral every
stop revving to keep it going. And that still doesnt
work well.
Work ive done.
New fuel pump
New cap and rotor.
New plugs
Cleaned....
Map sens
Exh gas.
Removed and cleaned throttle body
Checked all grounds
Cleaned pcv
Now it idles better than ever...get warm...shuts
down HELP...IM DIEING HERE NEED TRUCK FOR
WORK.....not a silverado....its a WT c1500...not
listed here

101,565

KenF answered 6 years ago

Are there any codes being set? You seem to have been thorough in tuning up, so I'm guessing you've checked if codes are being set. One thought is if it seems fuel starved you may want to check EVAP system esp. vent and purge solenoids, after it dies, pop the gas cap and see if it feels like tank was pressurized.

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