Alright, I've tried to troubleshoot this problem for a while, but its time to come and get some help.

I have a 94 Wrangler with the 2.5L. I was driving it on the road when it just shut off. The check engine light came on (duh) and the Fuel System ECU fuse is blown. The starter cranks everything over fine and I discovered that I am getting plenty of fuel to the fuel rail and I did a spark test and almost killed my friend. So I'm getting plenty of spark. So my thoughts are the fuel injectors are not doing their job, when I crank the starter, the engine doesn't even sputter, theres no fuel getting into the cylinders. Have any of you guys had a similar problem? Maybe one of you actually knows your way around the fuel infection system. Thanks for the help. Whoever figures this one out gets a six pack on me!
:beer: :beer: :beer: :beer: :beer: :beer:

have you tried starting fluid...if it fires then you can guess its the injectors...If it doesn't then it has to do with your spark...also check wiring and make sure you dont have any shorts anywhere...FWIW

Why dont you try pullin the codes and see what you got.. Also did you replace the blown fuse..

Originally posted by hy_desert_4wheeler
Why dont you try pullin the codes and see what you got.. Also did you replace the blown fuse..

That would be too fawking funny.

Do you have a FSM? It goes in detail how to trouble shoot the PCM and ECM for failures.

Originally posted by JEEP_TJ_FREAK


That would be too fawking funny.

Do you have a FSM? It goes in detail how to trouble shoot the PCM and ECM for failures.

No i dont have a FSM i have the Haynes Jeep manual (as well as other vehicles)and the Haynes Computer code manual they all tell you how to get the codes and also how to test the sensors..



Forgot to add that all you need to pull the codes is the IGNITION KEY

my jeep did this 4 days ago, and i still dont know what the hell is wrong. Please tell me if you find out. Were you doing any off roading or just street driving?

Try the 4bangers united forum (http://www.forumco.com/jeffy/) there's a lot of good 2.5L gurus on there.

I was on the street when it happened, and fawk you "did you replace the fuse" guy, thats the first thing I tried. Umm, I know I have spark and I know theres fuel going to the fuel rail, so I'm thinking its a computer problem. In the Haynes manual it gives a sequence of stuff to do to get the chech engine light to flash, but I can't get that to work. Is there any way to "test" the computer?

Oh yeah, Supergper, thats a good idea with the starting fluid, I'll have to try that, I'll let you know what happens.

On the top of the bellhousing sits the Crankshaft position sensor. It is held on with 2 bolts. After some time, the plastic casing cracks and the CPS becomes misaligned. As you have stated, you have fuel & spark. The spark is just not at the right moment. Try reaching up from under the drivers side and feeling whether or not the cps is loose or not.

Shaun

4004ever, thanks for the tip, but would that cause the Fuel System ECU fuse to blow?

Have you tried resetting the ECU by removing the battery cable for 5 minutes? Of course you would replace the fuse for the fuel circuit. Also, are you replacing the fuse for the ECU circuit? Because that would only be for the injectors, controlling there pulse. I am pretty sure that the fuse relay or fuse is for the fuel pump circuit not ecu circuit. If this is the case, then, you might have a problem with your fuel regulator somewhere on your fuel rail. It might not be sending back the fuel to the tank and allowing your pump to work to hard therefore blowing a fuse. JMHO

Shaun

How would I be able to determine if there is a problem with my fuel regulator? Where is the fuel regulator located? Do you think it would be worth trying to start it up after having the battery disconnected for 5 min? I'm seeing the $$$ rack up in fuses alone.

Originally posted by WideJ
I was on the street when it happened, and fawk you "did you replace the fuse" guy, thats the first thing I tried.


well FAWK YOU TOO:flipoff: :flipoff: I hope you never get it running till you take it to a mechanic and I hope it cost you a couple thousand dollars with that fawken attitude..

the fuel regulator is located usually on the fuel rail somewhere and it has another fuel line attached to it, to allow the excess fuel pressure to bleed of into the tank. As for testing it, I can't remember right now.

Shaun

well FAWK YOU TOO I hope you never get it running till you take it to a mechanic and I hope it cost you a couple thousand dollars with that fawken attitude..
thanks. me too :D

anyway, I'll let you guys know if these leads produce anything interesting. Thanks for the suggestions!

Ok, I got mine back from the shop and they said that the catalyic is blown. I suggest you check that, because the honeycomb in mine was pulverized into a ball that wedged into the pipe, and blocked the exhaust flow. P.S. if anyone knows where I can buy a catalytic converter that has the O2 sensor plug in (has to pass emissions), please tell me!

The cat? Did that cause your rig to abruptly stop running while driving it? Did blow any fuses? That'd be interesting if it did...

no fuse blown, but my car did just turn off, and all your other symptoms match.

How did you determine that your exhaust was clogged?
When you cranked it over, it didn't even sputter?
Mine doesn't give a hint of any fuel in the cylinders.

Here let me fix it........:flipoff2:

I took it in to a shop... :skull:

tell me what they say. My catalytic converter (got the jeep back today) grenaded and slowly ate itself apart untin the peices shot into the muffler and COMPLETELY clogged the pipe. No flow at all, no sputtering, nothing. good luck

It was my computer. Anyone want to give me money?