dracon79 Posted October 28, 2007 Posted October 28, 2007 I have an 88 comanche with the 4.0l. When I press the needle in the test port on the fuel rail while its running or with just key on it just drips out. Shouldnt be under alot more pressure?
Geonovast Posted October 28, 2007 Posted October 28, 2007 You should be running about 31 psi when idling. I've never pushed the pin without a tester on it, but I would assume it would be more. your best bet would be to put a fuel pressure tester on it and see what you're running at. When my fuel pump died last year it still ran...but was at about 14psi.
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