Question about 1993 Oldsmobile Bravada

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No start on 93 olds bravada without starter fluid , i did a fuel pressure test idle was good but when i switched ignition off the presure went straight to 10 psi from about 60 psi , i suspect a bad c

Replace fuel filter, also i have a iac and o2 sensor on scan to obd with paper clip

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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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Truck wont start


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1 Answer

1998 Bravada, losing power, now wont start


Does it have spark , fuel pressure ? If the starter spins the engine an does not start an run , you have a fuel delivery problem or a ignition system problem . There are videos on youtube showing how to test for these .

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