Pontiac Firebird - Popular Questions, Answers, Tips & Manuals
I have a 2002 firebird that we have put a salvaged motor in. Having a problem with zero oil pressure per mechanical guage and instrument cluster.
Sounds like you are well on your way to finding the problem.
Although it appears you may have done so, here are the steps.
1) Somehow be sure the oil is flowing through the pick-up tube to the oil pump. The tube can get clogged.
2) Be sure the oil is then flowing at a great pressure ( 60 p.s.i.?) out of the oil pump.
3) Now see if all the passageways are clear so that oil will flow freely through the engine. To me, it sounds like those passageways may be clogged.
Engine overhaulers will drop the bare block in a "soak tank' that will soften the gunk in the passageways so it can be blown out with compressed air. Finally,
4) be sure you do not have a wiped out bearing somewhere, which is allow the oil pressure to hemorrhage out of the sealed pressure system.
God bless your efforts.
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