orvillespooner

**FIXED**
New plugs rotor cap fuel filter, checked vacuum lines gasket under throttle body replaced 2 years ago. Very bad idle and runs terrible when cold after 15-30 minutes of driving gets much better. Before new exhaust installed was fine. This happened all of a sudden. 157k miles.
IT WAS THE FUEL PUMP NOT PROVIDING ADEQUATE PRESSURE. IT FINALLY DIED WHEN I WAS TESTING THE EGR. BANGED ON THE TANK AND IT SPRUNG TO LIFE AND ENGINE STARTED. REPLACED AND ALL PROBELMS GONE.

brcidd

Bad idle usually means stuck open EGR-- have you checked yours???

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Automotive A/C Engineer with:

'95 Chev 3500, 454 Dually Crew Cab- 145k miles- Wife's Camel trailer puller.
'94 Astro- 370k miles
'94 Firebird Formula- 5.7L 180k miles- gone- blown head gasket
'92 Chevy Lumina Van 3.8L 264k miles
'86 GMC S-15 - 2.8L 154k miles
'86 Buick Park Ave 3.8L 199k miles- my daily driver
'77 Chevy Vega- 2.5L 175k miles gone but not forgotten
'68 Camaro 396 4 spd RS/SS -72k miles- my high school car!!

All but the Camaro and Firebird are white....

orvillespooner

No I did not check that as it as still looks new as it was replaced 4 years ago and was thinking they usually last longer than that but maybe a vac line is the cause or debris stuck in the valve. Thanks a lot!