Ok guys I have almost give up but not without a fight.. I have a 92 Cherokee limited. When it started getting cold outside my jeep got where it was hard to start. When it did start it sounded like it was hitting on 3cylinders. Since then it has got to where it won't start at all. I have spark at the plugs, checked the injectors with a test light and they seem to be pulsing while cranking. I checked and it is getting gas and I even tried gas and carb cleaner in the throttle body. Did a compression check and it was good. All relays are good. Checked the timing to see if it may have jumped time that was ok. Could this be an ecm problem? I also checked the fuel pressure it was good and held it while trying to crank. It does however leak down quick. I don't think that would effect the starting.
Anything I missed checking or what's next?

 

Check codes yet ?

 

Yes .. no codes..

 

Have you verified 30-45 psi of fuel at the rail with a gauge? I've seen pumps going out and delivering about half the fuel and making the car run, but not very well.

You can also pull the ECU out and open it up and check for leaking caps or if it has a burnt smell to it.

 

No 12 or 55 ?

 

What's leaking down quick? Cylinder compression?

I would also check the battery (grounds, connections and wiring) and starter. ECM electronics should be covered in a hard resin like material (in my 91 it is) and rarely fail.

 

Yes I had both codes. 12 and 55 . I also had good fuel pressure.

 

I finally got the jeep running. Still need to do some more work on smoothing it out. After hours on checking sensors and multiple tests I finally was able to determine that the signal wire coming from the distributor connection on the female side was not getting a good connection. Due to the intermittent signal it was receiving it was throwing the timing off. I also had a capacitor in the ECU that at the base where it was attached looked like it had been getting hot. So I replaced that and now I am not getting a check engine light when starting. I went to the local junk yards looking for an ECU and a connector. I found a connector with the locking tab broke and no ECU.
Once I get these items replaced I will see how it runs.
But I am glad to hear it run and I appreciate all the input from everyone and I will keep you posted.
Thanks