Engine turns no fuel pump noise
#41
I read this thread carefully several times, but i'm obviously missing the point. It was about "something shorted to the ground and now it doesn't start", so i guess it's time to return it to the starting point. If you want to start diagnostics with fuel system, IMHO the easiest way is to trace voltage in the (+) pump wire from the pump (or pump relay) towards ECU, not opposite. If you want to check ECU - start with reading error codes. Just an opinion.
If I could get a decent wiring schematic to show me where wires start and go to would be just great.
#42
Senior Member
#46
Guess what guys! Yup it starts. I owe all of you a big thanks especially David58 talking it through on the phone really helped.
What it was was the R/Y wire coming from the inertia switch leads to the dash, behind the dash since there is no tank switch, it jumps to a red wire, so I jumped it from the R/Y wire to the R wire and she cranked right up. The BLK/O spade that was dead is now Hot! My wife snuck up behind me and screamed YEAAAAA and she startled, ok scared me. So now I get to put the dash together, tighten up all the loose ends and will be good to go.
One thing I have learned schematics sources online suck.
All of you thanks for hanging in there and kept giving ideas, not all worked but did help the thought process to finally get this right.
Oh and I apologize for my wiring and location ignorance.
What it was was the R/Y wire coming from the inertia switch leads to the dash, behind the dash since there is no tank switch, it jumps to a red wire, so I jumped it from the R/Y wire to the R wire and she cranked right up. The BLK/O spade that was dead is now Hot! My wife snuck up behind me and screamed YEAAAAA and she startled, ok scared me. So now I get to put the dash together, tighten up all the loose ends and will be good to go.
One thing I have learned schematics sources online suck.
All of you thanks for hanging in there and kept giving ideas, not all worked but did help the thought process to finally get this right.
Oh and I apologize for my wiring and location ignorance.
Last edited by USMCord1; 01-11-2009 at 04:26 PM. Reason: Appology added.
#47
sorry to bring back a dead thread but my problem is very similar but still having no luck.... went through and checked pretty much everything mentioned in this thread and havent gotten anywhere....
96 f150 dual tank straight 6....
pumps dont prime when key turned but will start if i spray starter fluid down the intake....
here is my thread if anyone can help that would be awsome....
https://www.f150forum.com/f10/96-f150-fuel-problem-24081/
96 f150 dual tank straight 6....
pumps dont prime when key turned but will start if i spray starter fluid down the intake....
here is my thread if anyone can help that would be awsome....
https://www.f150forum.com/f10/96-f150-fuel-problem-24081/
#48
Im having the same issue with my 91 F150 just started tonight...great!
Where is the fuel pump relay located? I have checke and I have no power to the fuel pump. I have made sure the shut off switch is on.....replacing the relay is next then the computer....for a 3rd time!
Where is the fuel pump relay located? I have checke and I have no power to the fuel pump. I have made sure the shut off switch is on.....replacing the relay is next then the computer....for a 3rd time!
#49
your diagram is right on i just replaced my f150 1994 front fuel pump and had to wire it to a different wire harness that came with it i wished that i would have saw this post it would have helped me alot.
#50
I have a 96 twin tank 4.9 300, parked it and won't crank due to no fuel. I've started simple and replaced fuel relay, tank selector, fuel pump and filter. Truck gets a spark but I cant hear the new fuel pump and will run if I put gas in the intake. Other mechanics say it may just be the computer gone bad or ignition module. Any opinions?