Having problems with your 1989 Oldsmobile Cutlass Supreme ?

When you turn the key on excessive fuel flows into the air intake. its a 1989 6 cylinder 3.1 fuel injected

Posted / edited by AnonymousUser on : 15-10-2018

Answers :

You could have either an injector that is stuck open or a fuel pressure regulator that has developed a leak. A leaky injector will usually only leak fuel into one cylinder as it is located just above the intake valve in the lower part of the intake while a leaky fuel pressure regulator will leak fuel into the front end of the intake manifold [behind the throttle plates] and the fuel will acuumulate throughout the upper intake plenum. When a fuel pressure regulator develops a leak the fuel that is escaping from it flows through the small 1/8" diameter plastic vacuum line which goes from the top of the regulator to the intake manifold. Even a trace of fuel in this line means the regulator is bad. I've seen both leak items leak but probably replace 10 regulators leak for every one injector. Good luck, hope you find your problem!
You have a injector leaking
Repair Help & Product Troubleshooting for 1989 Oldsmobile Cutlass Supreme

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