My wifes 2004 wj 4.0 wont start. It turns over great but will not fire because it keeps blowing the"fuel injector fuse" ( #26 On the engine fuse block) as soon as you turn the key to start it. I tried disconnecting all the wires to the F/I but the fuse still blows when you turn the key to start it. This doesnt sound good. ANY SUGGESTIONS?

 

No Takers??? I know, I am stumped too !!!

 

Sorry but I don't have a clue. Hopefully Willys55 will see this and respond, or you can send him a PM. He's the Ace.
Dan

 

I think i found the problem. I had a remote starter installed and they soldered a wire to one of the fuel injector wires. I totally disconnected the remote unit installed new fuses and it started. I am gonna run it for a few days,hopefully this was my problem.

 

That's great that you found the problem. Thanks for posting, and let us know if it returns.
Dan

 

Well, it wasn't the remote starter... I disconnected it and for about a week it was fine but now its still blowing fuel injector fuse. Does anybody know if problems with the coil pack would make the fuse blow?

 

Could there be a short in the ECM/PCM that can be tripping the fuel injector fuse? Whats really weird about it is after pushing it home (again) i put 2 new fuses and it blew both of them then on the third fuse it started right up and has been running for 2 days now. There is no reasoning behind this because its blowing fuses whenever it wants to.

 

sounds like you could have a bare wire (no insulation) rubbing against something causeing it to blow a fuse or you could have a short in the pcm.

 

Thanks....... What i did so far is change coil pack,cam position sensor,crank position sensor,new spark plugs and put a new ground to the motor. Hopefully one of these things will fix the problem. Its my wifes vehicle and i can't afford for it to keep breaking down. lol

 

alright so i had THE SAME THING!!! (it happened to blow while in the middle of a turn on a dirt road... loss of power steering was fun at 35)

on mine, part of the wiring harness that comes out the front of the fuel rail (for the o2 sensor on the exhaust manifold) had melted and was grounding out. so it was fine and then when it would touch all loss of power and another blow fuse.... look into grounding wires (although it seems like you already have)


I ended up replacing my entire ignition system (MSD ignition system with 12 mm wires and copper spark plugs, cap and rotor) and my fuel injectors with Ev6 style jeep performance injectors and LOTS of fuses before i finally found the grounding out.... lol

 

From these two posts it seems to me that in the area you unhooked the remote start you moved the problematic wire or wires and they just now found their way back into place. I would check and double check the area where you were messing with those wires. Also if you go to your local auto parts store they can sell you a circuit breaker with the appropriate amperage. This is so you can diagnose the problem without having to replace the fuse a whole bunch. Then once you find the problem you just go back to fuses.

 

Thank you guys for any input to this PITA problem....... Does anybody know if i was supposed to remove the little felt piece off the end of the crank position sensor? The reason i ask is because its been running good for a few days and all of a sudden it threw a P1391 code today. (Intermittent loss of CMP or CKP signal).