Ok this is going to be kinda long and detailed so bare with me. I have a 91 F-150 4.9 I6. It was recently in a wreck about 3 1/2 months ago. It still ran after the wreck but after having a tow truck bring it to my house from the frame shop it wouldnt run but would turn over. When the key was in the on position I noticed that the fuel pumps werent coming on. I checked the fuel safety switch but it wasnt triggered and was still in the down position. So I checked the ECC power relay and both of the relays were clicking in sequence like they are suppose to do. So then I checked the fuel tank switch (since i have two tanks) because I know if that is messed up it will cause the truck not to start or get fuel to the injectors, but that was fine and was getting power to the switch but I noticed that when I switched the tanks that they both read "full" (which I never have both tanks full) but seems odd. I wanted to know if there is somekind of fuse link that would cause that to be faulty and not allow the fuel pumps to run. But at the same time I havent checked the ignition module since I replaced it about 8 months ago, and because the fuel pumps not coming on was my first observation. I know I can check the fuel pressure valve to make sure the gas is getting to the injector but havent got around to it yet. But the fact that the ECC relays were working and neither of the fuel pumps are turning on is what is getting me. I was just wondering if there is any addition info someone could pass me just in case there is some crazy secret im missing out on.

 

Have you checked the fuses?

Leo

 

Have you checked the inertia switch to see if it was tripped?

 

yeah I checked the fuel inertia switch and it wasnt tripped and the fuses are good.