GirsMJ86 Posted September 25, 2006 Share Posted September 25, 2006 right now I'm getting 25-30 psi at the fuel rail when i crank it over but without engine actually starting id i crank for more then 10 seconds pressure drops to around 20 psi its a 1988 4.0 w/ 80,000 miles in a 1990 chassis well i think we might have found the problem. if you are ever getting 10 less then what you should be getting then there is either a problem with your fuel pump or the fpr. Alex Link to comment Share on other sites More sharing options...
comancheman Posted September 28, 2006 Author Share Posted September 28, 2006 well i got the fuel pressure where i want it now, theres a resistor over by the egr solenoid that was causing a problem, not sure y but when i checked it with a multimeter it is still was at 2.5olms it should be at 2.25 but i don't think that will make a difference. i just by passed it for now. should i definetly replace it or is it ok to leave it with no resistor? anyway it still runs like garbage, just for a longer time but it does stall after a few seconds usually. I'm gonna put on the exhaust and the o2 sensor tomorrow and see what difference that makes. its running real rich spark plugs were black and wet. o yeah compression is a litttle above 125psi is that where it should be? Link to comment Share on other sites More sharing options...
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