no start issue

polarisman729 · #1 (**permalink**) 02-23-2008, 07:50 AM

Hey guys,
I'm about ready to crush this truck if I can't figure this out. I've got an 86 f-150 with the 302 EFI. I was having some problems with the ignition and fuel pumps and I thought I got them squared away. Well I guess not. THe other day I was driving home and the truck died. I checked to see if the fuel pumps were running and they weren't. I was going to change the frame rail pump but I pulled it and tested it and it was fine. So i figured it was something electrical. I checked the ground to the batt and it was bad so i fixed that. Pumps working again. BUT.....BUT now it won't start. I sprayed some ether to see if it would fire and nothing......I had ignition problems before and I replaced the coil, cap and rotor, plugs, wires, and the control module. I also fixed some shabby wiring. After all of that she ran fine.....until the other day. Well, I checked to see if it was getting spark and it is at the coil and at the plugs. It just won't fire. I have no ides where to go from here. Is there some dummy switch i'm missing? Can anyone help me?

Franklin2 · #2 (**permalink**) 02-23-2008, 08:14 AM

Run a test and see if you have any codes. Here's a website that tells you how to do it with a testlight. www.fordfuelinjection.com

polarisman729 · #3 (**permalink**) 02-23-2008, 05:10 PM

I tried running any codes but i couldn't get it to work for me......another culpret of bad wiring.....

Franklin2 · #4 (**permalink**) 02-23-2008, 05:42 PM

Check for grounds from the computer harness to the battery negative. You are probably correct, bad wiring is going to really hurt your chances of fixing it. You may need to get a schematic and just go over the whole thing.

polarisman729 · #5 (**permalink**) 02-23-2008, 11:14 PM

i figured it out......i had the wires going to the fuel pump backwards.....i'm an idiot. It only took me two days to figure that out.