My Grandson's first vehicle just stopped. 1987 Jeep Cherokee with auto Trans
Jeep won't start has no fire but has fuel
3 different Mechanics Have replaced everything on it.
Crankcase sensor
Computer
Fuel pump
Coil
Distributor
all the modules on the fender walls
Ignition switch
Start Module under the coil.
Cleaned the multi wire connector on the fire wall

 

When you say Crankcase sensor do you really mean Crankshaft Positioning Sensor?

 

If it were mine, I would go to www.cruiser54.com and complete tips 1 through 5 before doing anything else. Don't need a mechanic to do them either.

 

Does that mean it turns over? Or doesn't even do that?

 

Was one of them named Larry?

 

Check your grounds

 

It could be the computer. If there is no spark, then you start at the plugs and work backwards to the battery. Have you had a chance to do anything yet after your first posting?

 

yes

 

yes it turns over no spark

 

All Grounds have bee checked computer was replaced 3 times

 

All that has been done

 

No, let me fix that for you:

3 different Mechanics parts-swapping morons Have replaced everything on it.

Trust nothing those idiots did. Nothing. Assume nothing they did was right. Nothing. Clear the history completely out of your mind.

Start over, troubleshoot systematically. Clean slate. Focus on the symptoms, and do not rule out anything or skip anything based on past actions by these clowns.

 

Ha! Mark! GJ!

 

What he said! ^^^

 

My knowledge of the early XJ is limited, but the 2 "high probability" issues that I would be concerned with

1) an open wire or connector fail somewhere

2) a short circuit in a sensor or its wiring..sensors are connected directly to PCM and a direct short to the PCM is not good