Question about 1993 Isuzu Trooper
1993 trooper 3.2 misfires when hot.
Have a look at your spark plug wires. You may have one laying upon a hot surface which may have caused degradation to the wire's insulation which would allow the spark energy to short to ground instead of going to your spark plug. If you find a damaged wire, replace them all with NGK stock wires (very good quality), and find a way to prop up your wires so that they won't touch anything.
Also, you may have a defective spark plug. Change them all as well. I just installed NGK Iridium plugs and they perform excellently.
You should have coil packs. Each coil pack fires two plugs. You may have a defective coil pack.
They should be right up front on top of the engine. Engine coolant lines run underneath them, perhaps the defective unit is affected by the heat from the coolant hoses.
Posted on Sep 11, 2008
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Posted on Jan 02, 2017
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