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Re: 1991 JEEP WRANGLER WONT START
Take the distributor cap have someone crank the car and look if rotor turns, look at rotor conditions, I am sure that you have replaced it, hot wire from positive on the battery to positive on the coil, if car starts after you have a problem on the key, Is it fuel getting to the injectors? after You replaced so many things,if your rotor is not turning when You crank the engine, your timing chain must be defective or timing gear,
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The auto shutdown relay in your vehicle is controlled by the computer. If the computer does not see a signal from the crank or cam sensor, it will turn off power to the relay which in turn shuts off power to the fuel and ignition system. Unlike those in many passenger vehicles, it's not connected to an impact sensor. (as jeeps are off road vehicles as well as being transportation, if they had an impact sensor, they would be prone to shutdown when traveling over rough off road terrain) The fuses to the relay are affected by shorting or overload of any components they serve, or by a problem with the relay itself.
I'm assuming you checked voltage through the auto shutdown relay? If you attempt to read codes, does it read? (even if it shows nothing except that it's working) Is there a factory security system? (if so make sure there isn't a broken wire in the door harness) Also, check block, dash and computer grounds as well as power from the ignition switch. Were there any problems with anything at all before it stopped starting?.
first check the firing order plug wires, then check the timing , not sure of this but check the timing by lossening the distributor while enging is running and manually rotate the distrubutor to adjust timing, by ear w/o a timing light. maybe need to be retarded or advance a bit. check auto maintence manual for firing order.
Try your camshaft possition sensor. If it is the same as my problem I just had to replace that and it started right up. Oh and mine was built into the distributer assembly. Take off cap and pin it's the plastic thing at the bottom. Should just pop out and you have to go to the dealer to get the part. Hopefully this helps!