Question about 1989 Pontiac Firebird
Complete fuel system is no more than a year old literally from the injectors to the filler neck is replaced all to specs. which leads me to believe it can only be an ignition problem. the car breaks up badly during acceleration on top of hard starts. not sure if its directly related.
Lets find out if you have any vacuum leaks. Its the right age for them to surface. Do a cylinder leakage test with compressed air. Lets take it from there .
HOWEVER, if you strongly feel its ignition related take it to a shop that does scopemeter testing. This is the quickest and most accurate way to get to the bottom of an ignition issue.
Hard starting Does this happen at all temperatures?
Normally I would say there is no residual fuel pressure. In your case the pump was replaced.
the only other fuel related item would be the pressure regulator may be stuck open not building pressure.
Keep me posted Firebirds are great cars to have and work on.
Posted on Apr 28, 2010
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Posted on Jan 02, 2017
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