rthouck

I have an 1988 f250 5.0 MT, that will crank over but is not getting fuel. The fuel pump (high pressure one, there is three on the darn truck) is reading 12v with the key on. However, when I crank the engine there is 0psi at the fuel rail. If I put 12v's on the high pressure pump it whirrs and puts up about 42psi. But if I do that and try to start the engine nothing....

I've also put a cheap OBD I scanner on it, (the $20.00 one from autozone that blinks codes out) it wont read any codes at all. It just leaves the little light on no matter what ?

And the engine does start up on starter fluid and then die out.

If someone cant give me some help I'm just gonna start the thing on fire soon.

Thanks in advance !

aode08

wtf 3 pumps,

replace the bad ones and fuel filter(s) , I ran into an old LTD that had 2, the fuel pump relay was shot and the wiring burnt.

Timspony

....Sounds like a bad fuel pump or maybe a relay?!

FORD TOUGH

42 psi is more than enough for it to start. Check with a noid light to see if you have injector pulse. Check your computer ground. You may have a bad EEC relay.

rthouck

The fuel pump relay is good (I replaced it already). It has 3 pumps because it has two tanks on it. So two low pressure pumps and 1 high pressure pump. Which we know works because if I jump 12v's to it, it runs over 40 psi. The ground for the computer is good. And I've tried two different EEC's in it. (2nd from a junkyard).

For the fuel injector pulse the one is a red wire which is always hot (if I remember correctly) and the other wire grounds it?

The other wire goes directly to the EEC. So if I'm not getting a pulse its a bad EEC? (which means both of mine would be bad)

mjr46

FYI, one post regarding your issue in one section only....per forum rules......the proper place where you posted this thread initially in general tech is the place for it