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Topic Review (Newest First)
05-15-2012 01:14 PM
Mark Tice I haven't had the chance to update on this, finally got the distributor set on the proper tooth, she fired right up and the idle was hanging out at a grand or so. What i didn't know is that if you flood a vehicle repeatedly the gas will end up in the oil.... glad i caught it before i went down the road. Did an oil & filter change All is well for now i guess.

Thank you to those who have offered input!

Now, time to get this stinking body lift out.
05-11-2012 02:48 PM
Mark Tice Too much $$$$. I bought this thing thinking a few bucks here and there...
05-11-2012 01:56 PM
jakep Man drop a small block in it lol
05-11-2012 12:41 PM
Mark Tice I think I am going to paint under the hood " It's a yj Get use to working on it"
05-11-2012 12:40 PM
Mark Tice I was locked and loaded, Even had a cliff picked out
05-11-2012 11:58 AM
brentd711 Good job sticking with it instead of shooting it

05-11-2012 11:18 AM
Mark Tice It lives!!!! Autozone call again this morning and notified me I still had the wrong computer. Went and got mine, as soon as I plugged it up she started right up!
05-10-2012 09:39 PM
Mark Tice I will take a look. Thanks & welcome to the forum!
05-10-2012 08:58 PM
Wildram Hi new guy to the forum reading proble and responses
When installing the new ECM it's possible one of the pins
May have folded over breaking off also those old
Chrysler product elect connectors are notorious for
The pins slipping inside the housing causing poor or
No contact I its a pain but it's better to double check
and double check again you may find something
U over looked before good luck!!
05-10-2012 08:31 PM
Mark Tice Moving the distributer 1 tooth Got it to idol, But not run like it should. Think I'm gonna have to go back to the chain and check it from there
05-09-2012 09:16 PM
Mark Tice Or that i have the distributer one or two teeth off
05-09-2012 09:16 PM
brentd711 Sounds like the distributor is off by a tooth. Number 1 piston at TDC on the compression stroke and rotor just approaching #1 position and you should be golden. If you were 180 degrees off (at #1 position on the exhaust stroke) it wouldn't start at all.
05-09-2012 08:38 PM
Mark Tice Yes I replace the timing gears & chains to reset the timing you have to pull the distributor, I don't see any way to adjust it. There is a possibility I didn't have the gears right
05-09-2012 08:29 PM
brentd711 You're getting closer!

Sounds like your timing is off. Did you replace the timing gears or have the distributor out?
05-09-2012 05:44 PM
Mark Tice Well I got my computer back today,(after waiting far too long) Put it in and cranked up It would only idol really rough When I held my foot on the gas. Fuel pump is working properly I don't know other than the new distributor cap might be bad?
05-04-2012 03:53 PM
brentd711 Do you suppose there's another guy out there somewhere with your computer pulling his hair out trying to get his Jeep to run
05-04-2012 02:19 PM
Mark Tice And the plot thickened this week, thru s series of events and phone calls I find out that my refurbed ECM is not mine at all, for 2 weeks i have been working around and trying to make something work that isn't supposed to even be in me jeep! My computer is in the great state of PA waiting for auto zone to get their ducks in a row and in the unlikely event they do get it straight im going to put some mud in the tires this weekend!
04-30-2012 10:49 PM
robk I had the same problem and had to bridge a fuse on the relay and change out my ignition switch....some of the electrical on a 90 has to be cleaned up and modified slightly to work without constant issues
04-30-2012 10:39 PM
brentd711 Take the fuse out and run a 12V jumper to the load side of the fuse. If the pump starts you have an ECM or ignition switch issue.

Any warranty on the refurb ECM? They should at least be able to tell you which pin is fuel pump (if you haven't already found that info).
04-30-2012 10:01 PM
Mark Tice I have continuity from the fuse box to the fuel pump, checked with a meter. Good thought though
04-30-2012 09:55 PM
jakep Trace the wire that goes to the fuel pump make sure u dont have a cut wire if u do any type off roadin and run a wire to the pump from the battery as a test wire i have a 91 and when i got my jeep someone ran a wire right from the fuses under the hood to the pump
04-30-2012 09:44 PM
Mark Tice I can hardly believe that a bran new computer is junk.....
04-30-2012 09:23 PM
Mark Tice Well I did some checking tonight, I have continuity all the way to the fuel pump. I have a good ground all the way to the fuel pump. When the key is turned to run or start the orange wire coming off the relay has no power. According to the wiring diagram this is the leg that carries power to fuel pump. Good grounds, good continuity, good fuses, good relay, good fuel pump... bad computer?
04-30-2012 03:47 PM
Mark Tice The ecm Is not sending power to the pump. Going to try to dig through the harness a little more tonight. The ground has been scrubbed clean And the new connector put on the end of the wire. Bump? I feel like this thing is running me over
04-30-2012 12:04 PM
brentd711 Monday bump...any luck?
04-26-2012 09:58 PM
Originally Posted by Mark Tice View Post
..... guess i'll be tracking wires down this weekend???
If it was me...I'd start by dumping some fuel in the TB and making sure it will fire and run. If it doesn't fire you could still have a CPS or ECM issue that's not allowing power to be sent to the pump.

If it fires I'd check the power circuit first. It's tough to check the 2-second blip when the key goes to "run" so it might be easier to take the feed off the starter and have someone hold the key in "start" where it should be getting continuous power to the harness connection for the pump. No power... start tracing all the way back through the relay to the ignition.

If you have power you should be able to ground the pump to the frame, right off the pump harness, effectively bypassing any ground that runs up to the engine compartment.
04-26-2012 09:26 PM
robk I just replaced the pcm in my 90 2.5 yj and now won't turn off without unplugging the fuel pump relay
04-26-2012 08:24 PM
Mark Tice Well fuses didn't do it..... guess i'll be tracking wires down this weekend???
04-25-2012 10:08 PM
Mark Tice Thanks for the encouragement
04-25-2012 10:07 PM
brentd711 Been there, done's got to be something simple
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