1990 jeep cherokee lost power

Question edited into written English.
Question moved to Jeep Cherokee category.

Typing is all CAPITALS is considered shouting and rude. It is also difficult to read!

Did you check for Diagnostic Trouble codes (DTCs). Have you disconnected the battery or let it run flat. This has all the hallmarks of an immobilizer lock out.

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Cars are like that. I think they like driving people crazy. I\'ve been driven crazy by my Sentra for three months now.
Has the fuel pressure been checked? I wonder if your fuel pressure regulator has failed (the diaphragm inside will rupture and suck extra gas in through the vacuum hose attached to the regulator-could be the cause of backfiring). Something to check, anyway.

http://jeep.off-road.com/jeep/voice/the-jeep-creep-questions-and-answers-15727.html

click this link and read the FQA

hope you fill find you problem solution

You want to check your timing for accuracy and then check all plug wires for burned or cracked ends. Also check the single coil tower where the coilwire connects for very small cracks. Then check the inside of the disrtibutor cap for the same small cracks. Throughout this process I'm certain you'll find the culprit. Thanks, Dana

With what you say,get the fuel filter checked.Cheapest and easiest place to start.Its on the chassis rail,back near the fuel tank.Hope this helps

its vapor locking try losing the gas cap a little and then drive it around if that works replace it or lust leave it lose

possible throttle position sensor ,. air intake leaks , ignition coil or secondary ignition cable , important to have good clean ground and battery connections also

Seems like a main power lead has corroded and is breaking contact.Trace the main power lead from the battery and clean up all downstream connections. This applies to ground wire as well. After sitting for a long time moisture can get into connections and cause this. Most times daily driving dries this out before it can give problems such as you outlined. If you try to start it in the dark, sometimes you can see some sparks at the affected connection!

Aaron, I had the same problem. It is the most expensive part of course the computer. I replaced everything as well till I replaced it. They are remanufactured and have had problems with them as well. I am on my third one now at 200k miles. Oh and by the way it does not show up on the diagnostic check. Good luck

Frank

could be a clogged catalityc converter. good luck