Ok I removed the intake manifold to take the valve cover off to re tighten the rocker arms. I did nothing electrical, but now when I turn the key, the fuel pump does not prime. I have a 92 f150, 300 with an e4od and duel tanks. what would couse this? it ws working fine until i did the mechanical work.

 

Was any ground wires taken off?

 

check grounds, especially the ones at the battery... fuel injectors.... and the one behind the drivers head light on the inside of the core support... fuel pumps. check the green relay for corrosion

 

I only removed one ground, the one connecting the engine to the firewall, i have cleaned it good and made sure everything is tight. I cannot find any lose ground wires. all i did was remove the intake so i could remove the valve cover. i was very careful...could i have messed something up removing the positive on the battery before i started working on it?

 

no, you have bumped something while leaning in there to do the work. check all connections, especially the ones over by the air cleaner box. the fuel pump relays usually turn green, and become brittle , so check that as well, use care when unplugging the relay, and look for wires corroded off, I have had them even corrode the post off the inside of the relay.

 

Ok I will recheck..it is a B to get the last bolt off on the rear of the intake...i will check that side good, thats where i really had to lean in

 

I just cannot find anything lose..where should I check now?...could the relay be bad?

 

yes, could be corroded, and like I said before, a post could have even rotted off. be careful taking the relay out, it breaks easy. did you check if the interlock switch is tripped? 92 I think is around passenger kick panel somewhere

 

I did and the button is all the way down , like inside the holder...not sure where it should be at normal position?, I was going to over ride it to check but not sure which wires to jump

 

they usually don't go bad. whack it with your fist on the side, the button should pop up, when up, and you push down on it, they "click". both tanks dead?

 

try re posting in the 87-97 threads, there's a couple of really sharp electrical guys there. head the post with- fuel pumps not working after intake repair

 

yes both are dead. were working fine until i did a little mechanical work...it has to be a ground or a dead relay..i will get one tomorrow..I'll post on the other board also..thanks for all your help...

 

no prob, I'll still be around to help, but that way there will be more people to help as well. wish you were closer, I would come over and help out, but .... oh well.

 

mighty neighborly of you, I'll post after I put in the relay, its only 10 bucks, at worst I will have a spare

 

Did you check the fuses ?