New to the group so hope this hasn't been talked to death.
Recently inherited this car and the check engine light is on and has
been for several yrs but dad would never have it checked out.
Engine codes say the problem is engine is running lean on both banks.
No other codes showing up. Engine seems to run OK except sometimes I
notice a slight hesitation when taking off from a stop sign. This is a
new engine for me so not too sure where to begin. My thought is with
both banks reporting same condition it is unlikely a bad injector. Most
likely problem has to do with sensor/component shared by both banks.
My thoughts are:
* Could it be engine is running OK but some subsystem isn't working up
* O2 sensor working well enough to not be reported as a problem but may
be reporting engine is running rich so computer is leaning out.
* Low fuel pressure on the fuel rail. Gage reading is low 30's and I'm
thinking it should be closer to 40 PSI. At this point not sure how
accurate gage is. Disconnecting the vac hose on the pressure reg does
raise the pressure 6-8 PSI.
* Possibly either throttle position sensor or MAP/air flow sensor not
working up to spec.
Anyone got a bone to throw me as to possible cause? If I get this
resolved, is there an easy way to reset the computer other than
disconnect the battery?