Question about 1993 Oldsmobile Bravada
Replace fuel filter, also i have a iac and o2 sensor on scan to obd with paper clip
Internal pressure regulator on the fuel pump should hold for about a minute but some pressure loss is normal. However, on initial start-up, the pressure must be at operating pressure or the system wont work. I suspect the fuel pump is failing, it is an all too common problem for GM trucks and SUVs with mpfi fuel injection.
IACs do not go out very often, usually there is a problem with vacuum leaks, dirty throttle assemblies.
Posted on Dec 12, 2014
Testimonial: "the pressure was good with the ignition in the on position before start up"
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Posted on Jan 02, 2017
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