XJ Problems

[CFMopar]

I had a problem with my 96 xj on friday. It died on the 401 in traffic and would turn over but wouldnt start. No spark. Ended up getting it towed and the shop said it was the ASD relay replaced it and it was fine. Sunday I was heading back to school and it died again same problem. Turns over but wont start... No spark..

Shop again said it was the asd relay. They spent an hour trying to dignose the problem and havent found whats casuing it to go.... They checked the fuse box and all the wiring and sensors related they said...

Now one thing I noticed when it died.. Both times happend at slow speeds. The 401 was in traffic edging along.... and the other was backing out of a parkingspace... It would just stall out and not start. Now I dont know if it was me stalling it and it caused the fuse to blow or if the fuse blew and then it just stalled out. But thats the only thing I recognized from both secenarios...

Anyone have this problem? They just replaced the relay again and its running. But they cant find whats causing it to short...

Thanks guys

[Plumcrazy]

Any fault codes?

[CFMopar]

nope

[Plumcrazy]

Does it  blow fuse #20 in the power distribution center when this happens?

You could try swapping the auto shutdown relay with another one the next time it quits on you.   Use a relay thats not needed to run the vehicle, like maybe the a/c relay.    I've seen some power distribution centers with internal corroded wiring.

[CFMopar]

No other fuse blow jsut the asd relay... Are you saying that its possible i gotta replace the whole distribution block?

[Plumcrazy]

No other fuse blow jsut the asd relay... Are you saying that its possible i gotta replace the whole distribution block?

Let's make sure I'm following you correctly.  Fuse #20 supplies power to the ASD relay.  Are you saying that fuse blows or that the ASD relay keeps needing replaced?

[CFMopar]

The relay

[Plumcrazy]

The relay

The ASD relay supplies power to the injectors, coil, alternator field and the O2 heaters.   The power to all those things goes though fuse #20.   If that fuse isn't blowing then the problem is not too much current through the relay.

I'm thinking maybe the problem is with the connections to that relay.  Possibly the act of removing and reinstalling the relay temporarily cures the problem.
That should set a code but 

I would do this. Start the vehicle and wiggle the ASD relay and see if the vehicle quits, also try tapping on the PDC.
If nothing happens next remove the the relay and look for any corrosion on the terminals in the PDC.

Then I would get a 1/4 inch male spade terminal  and use it to test the terminals in the PDC to be sure none of them are spread out.
If you still don't find a problem then I'm pretty sure the PDC can be opened up to see if there are any signs of internal corrosion.

[CFMopar]

well it just died again backing out of a parking space... Stupid pos car... Its now sitting in a best western parking lot... I'll get it home some how tomarrow and try then...

[CFMopar]

can i just just the relay? if its jsut the relay blowing and the fuse is still fine?

[CFMopar]

Ok so ignore everything I posted.. The shop is a bunch of idiots. Its the fuse not the relay... They told me the relay...

I was looking in the owners manual to find out what this fuse is but it doesnt say for 30 amp min fuse...  So I'm attaching this picture

As I said  before it only happens at low engine speeds.. Reversing etc... If I rev the engine up before I move its fine but if I try to back out like a sane person it dies...

[Plumcrazy]

That makes more sense.  Fuse #20 is the one that protects the ASD circuits.   If theres no chart under the PDC cover to identify it,there should be one in the owners manual.
It should be a 30 amp maxifuse.

If fuse #20 is the one that blows you have a lot of possible causes.  The power for the injectors,coil,alternator field and O2 sensor heaters all go through that fuse.
I would inspect the wiring harnesses that go to those items real good.  You could also start the vehicle and try moving the wiring around to see if the fuse blows.

[CFMopar]

Is the one with the red arrow the one for the asd? THe problem is the user manual shows a differnt fuse panel than whats under the hood.

It shows this one
http://autorepair.about.com/library/faqs/bl031h.htm

as u can see by my picture thats not whats there.... Also its a mini fuse that keeps blowing..

[Plumcrazy]

Is the one with the red arrow the one for the asd? THe problem is the user manual shows a differnt fuse panel than whats under the hood.

The fuse that the arrow is pointing at is the ASD fuse.  The service info says it's supposed to be a 30 amp fuse, thats why I thought it was a maxifuse.  I think thats a mistake in the service manual.   A 20 amp is probably correct.

[CFMopar]

I had a 20 in there at the time of the photo cause it blew and it was all I had.. But the top of the cover says 30 amp

[Plumcrazy]

I had a 20 in there at the time of the photo cause it blew and it was all I had.. But the top of the cover says 30 amp

The first thing yo need to do is get some 30 amp minifuses.
Maybe the manual is correct.

[CFMopar]

Its blown 30 amp fuses....

Ive cleaned it out using some contact cleaner and ithasent blown since... Been a few days... Well see how it goes.. I dont got time to do it now anyways So I guess I'll just buy alot of fuses for now

[mikej678]

Try checking the wiring going to the crankshaft position sensor on the top of the transmission on drivers side. I worked on a copule of TJs that wouldn't run & the wires burnt against the exhaust manifold. Didn't take out any fuses though.


Mike