92 2.5 engine problems - Jeep Wrangler Forum

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Old 03-22-2014, 03:02 PM   #1
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92 2.5 engine problems

hi just joined the forum today. need help diagnosing 92 2.5 running rough.
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Old 03-22-2014, 03:21 PM   #2
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engine misfires. will idle okay but then sputter. pop and backfires occasionely. replaced plugs, dist. cap, wires, fuel filter,and fuel pump. checked for vacuum leaks. any ideas?
92 2.5 have 35 psi gas pressure. regulator seems to be working. dash codes are
12...ignition
33 ac clutch relay
21 ox. sensor
17 engine running too cool.
thinking maybe weak ignition coil???

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Old 03-22-2014, 03:28 PM   #3
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Could be the fact that it is a Jeep!

Don't know if '92 has a map sensor or not, but if it does check that. Coolant temp sensor also.
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Always starts and stops.
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Old 03-22-2014, 03:31 PM   #4
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i'll check them. thnx
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Old 03-23-2014, 02:46 AM   #5
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Oxygen sensor will definately make it run like that, for the too cool code thermostat could be stuck open, other codes are normal.
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