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Old 07-30-2011, 11:35 AM   #1
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1990 2.5 turns off

My 1990 wrangler 2.5 after about 20 min or when warmed up idle starts to rev high and then drops and vehicle dies. Replaced more parts then I can think of and checked wiring. Parts replaced spark plugs,cap, rotors,wires,fuel filter,o2 sensor,egr, coolant temp sensor,tps sensor, idle control,crank position sensor,map sensor,ecm, and also found pin32 and pin 5 at ecm damaged replaced pins. any new ideas would be helpful.

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Old 07-30-2011, 11:40 AM   #2
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try the YJ tech section.good luck.

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Old 07-31-2011, 05:46 PM   #3
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Check the manifold air temp sensor.
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Old 07-31-2011, 06:03 PM   #4
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more info??.....does it start right back up after this shenanigan, or is it hard to start after?
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Old 08-01-2011, 12:05 AM   #5
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Sometimes it starts right up with a high idle and sometimes its hard to start about 50/50
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