Question about 1997 Ford Explorer AWD

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1997 Ford Explorer with 4.0 SOHC is flooding out at start

When we go to start the 1997 Ford Explorer it is flooding out. I checked for spark in all of the plugs and that was fine. I checked the fuel pump pressure turning over attempting to start and that was ok (40 psi). I made sure the inertia switch was ok and it was. I finally pulled the fuel pump relay and it fired up and died out. I inserted it back in and it went fine. Later I came out and was going to go and it flooded out again. I repeated the same steps by pulling out the relay and it fired and ran. I inserted the relay and it died out. I started it again and it ran. Could I have a bad fuel pump relay? Any other ideas or procedures?

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Its sounds like the fuel pressure regulator is bad locate the regulator on the fuel rail and remove the vacuum hose if there is fuel there its bad if not have some one turn the key on or crank the engine if fuel come out its bad. What seems to be happing when it sit for some time the regulaor leaks fuel by into the engine when you go to start it its just that its flooded out plus when you turn the key on and are trying to start it its now dumping even more fuel into the engine. When you remove the relay and crank it there is no fule going to the engine thus making it start.

Posted on Jan 08, 2009

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It does sound like the relay is working part time and not all the might want to go ahead and replace it just to find out for sure.

Posted on Jan 08, 2009

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Check this link. Hope this helps:)

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