Topic: YJ would not start

[neale_rs]

Went on a wheeling trip this weekend and had some problems with the
'95 YJ, 2.5L, AX5.  The check engine light would not turn on and the
fuel pump was not activating.  Engine would turn over fine but would
not start.  Also dash would illuminate, fuel gauge activated, etc. It
did start after trying many more times and once started would run
perfectly, no misses, no stalling, no hesitation.  This happened twice
on the trip.

Things tried:

Clean all relays and connectors, clean Crankshaft position sensor connector, clean computer connector.

Any ideas? 

Thanks

[neale_rs]

Still haven't been able to get it started since the trip.  Any ideas?

Thanks

[ncjeepinyj]

I have a 95 as well and had the same symptoms before. There is a fuse under the dash labled DOME and it wasnt making good contact and caused it not to start some time. Its worth a shot, to check and/or replace it. I ended up bending the ends of a new fuse in kinda half moon shaped so it would fit nice and tight and it has been fine ever since.

[neale_rs]

Actually that happened to me once too when I used the DOME fuse to replace another one that had burned out.   I had forgotten about it, thanks for reminding me.

[ncjeepinyj]

Let me know if that does any good.

[neale_rs]

Here is an update, positive but not very satisfying.  Yesterday I made sure all the fuses were OK and pushed them in firmly.  Tried to start and no go. Then I checked the voltages at the relay cavities to see if the battery voltage was present whith the ignition on RUN (and not present with ignition off).  It was fine so it looks like the ignition switch is not the problem. I then checked at the computer data link and it had a ground and power from the ignition.  I then turned off the ignition and turned it back to RUN and the check engine light came on!  I was pretty surprised.  I then put the relays back in and it started right up.  Since then I have started it about 3 times with no problems and have verified that the fuel pump runs each time the ignition goes to RUN about 20-30 times.  Also, no relevant codes come up with the on-off-on-off-on method. It seems to be working fine now.  What bothers me is that I didn't do anything to fix it and this type of fix tends to unfix later.  Could the computer have been reset in some way when checking at the data link?  Or was it that fact that I put the ignition switch on RUN with the relays out? 

[neale_rs]

Well, finally got the new computer installed and the jeep is starting and running great now.  It seems to have a bit more power and the idle is a a bit lower and more stable now.  It took a while but it's good to have it running again.