Cannot start jeep?

Asked by jackman May 05, 2012 at 03:18 PM about the 1987 Jeep Cherokee

Question type: Maintenance & Repair

Switched motors in 1987 jeep, cannot start.  is there a sensor swith preventing me from starting jeep? new pllgs, cap, rotor, battery, fule pump and filter. getting gas and spark, timing seems correct however will not start.  new crankshaft position sensor,   cranks good wont start?      need help.   Dave

3 Answers
199,795

dandyoun answered 11 years ago

If its a used motor that you installed I would check compression on all cyl to insure no problems there. How old is the gas that was in the tank? Have you tried to shoot ether in the intake?

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4,005

Anthony answered 11 years ago

I had that happen once to my 1993 Wrangler. I held the throttle open while cranking the engine.

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Don answered 11 years ago

Does this have an automatic trans or stick? From what year did you get newer engine.. If automatic, and the year of engine is newer, You must use the older engines flywheel with the starter gear... It has the correct holes for the crank position sensor to pickup the correct sequence... The newer engine had the newer computer and a different fltwheel...... That is what happened when I swapped out my 88 Cherokees engine to a 97 Cherokee engine...

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