excessive fuel, starts then dies. | Ford Explorer Forums - Serious Explorations

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excessive fuel, starts then dies.

Brutus

New Member
Joined
September 23, 2003
Messages
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City, State
Pittsburgh PA
Year, Model & Trim Level
97 xlt
I just bought a 97 sohc ex. and can't keep in running.
I searched on fpr threads about rich running conditions but I can't keep this ex running. It will start then wants to immediately die. It then will not start and seems flooded with fuel. I have to let it sit for a while then the same thing will happen. The plugs are soaked with fuel and fuel is even seeping up through the intake. Could this be a fpr problem. I'm stumped. I cleaned the maf and have a knew iac motor on it. I will check fuel pressure but I need an adaptor for my pressure tester, anyone know where to get an adaptor. Thanks for any help.
 



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Sounds like your fuel pressure regulator is bad.O2 sensors might be bad too:(
 






Thanks 88vert. Could a bad fpr dump so much fuel that the motor will not start because its flooded? I've searched posts and could not find anybody's ex not starting because of a bad fpr. Has this happened to anyone?
 






If only a few of the plugs are bad then it could be injectors; if all are bad then it's probably the FPR.
 






My old 92 would not start when the FPR went bad.It is only a 60 dollar part,cant hurt to change,becase eventually it will probally go out:(
 






Thanks for the info guys. By the way, is there a way to test the fpr besides a psi test? Also if the o2 sensors are bad will it definetly throw a code or not. And how do you know which o2 sensor is malfunctioning?
 












A bad O2 sensor will not cause excess fuel at startup, unless you're so totally flooded at shut-down that it's still there later (which it doesn't sound like).
 






When did Explorers go to a returnless fuel delivery system?
On a recirculating system, like my '92, when the diaphragm on the FPR goes out, it can allow fuel to flow into the intake manifold via the vacuum line that goes to the FPR. If the diaphragm is bad enough, it can dump lots of fuel into the cylinders, which sure sounds like the case here. If you pull the vacuum line off of the FPR, if it's full of fuel, then the FPR is almost certainly the culprit.
 






I believe returnless is 98+.
 






Thanks for all the help, I'll test fuel pressure tomorrow and probably change the fpr, which seems to be the problem. I'll know better after i check pressure. As for tonight I'm gonna watch the STEELERS kick the crap out of the Browns. I'll post after I find the problem.
 






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