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Old 07-30-2011, 11:35 AM   #1
Join Date: Jul 2011
Posts: 4
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
Join Date: Jan 2010
Location: Las Cruces, NM
Posts: 2,291
Check the manifold air temp sensor.
(Sold)1994 Jeep Wrangler 2.5L, Bestop top
/w steel half door and slider windows
5 speed, 2.5" lift, 31" tires,rack lights
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Old 07-31-2011, 06:03 PM   #4
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Location: Central Alabama
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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
Join Date: Jul 2011
Posts: 4
Sometimes it starts right up with a high idle and sometimes its hard to start about 50/50
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