HOW MUCH COMPRESSION SHOULD A 91 OLDS 3.1 HAVE

1991 Oldsmobile Cutlass

Tiny

lmmowerman

December, 7, 2011 AT 12:36 AM

This car has a history of shutting off. Would start back up until recently. Replaced fuel pump, fuel filter. Plugs, wires, pvc valve, fuel pressure regulator. Now it starts, idle for 5 seconds and stops. After a couple trys it puffs back through the intake manifold. When doing fuel pressure regulator, put new intake gaskets and new erg valve gasket. When inspecting egr valve the port on the intake was clogged. Used a small screwdriver to punch through. What do you think?

FOUND 354 RELATED QUESTIONS

3 Answers

Tiny

Jacobandnickolas

December, 7, 2011 AT 12:45 AM

Compression should not be lower than 100psi in any of the cylinders. Also, the lowest cylinder should not be lower than 70% of the highest. If it is, you will experience a miss or rough idle.

Tiny

lmmowerman

December, 7, 2011 AT 1:43 PM

Thanks for your help

Tiny

Jacobandnickolas

December, 7, 2011 AT 5:47 PM

Not a problem. Let me know if you have other questions.

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