What would cause misfire of #2 and #3 cylinders?

Tiny
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Keep me posted on how it goes.

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Tuesday, January 31st, 2012 AT 6:40 AM
Tiny
1999SL2
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I bought a new ignition module, installed it and that did the trick, but not the idle is high and erratic. I removed and cleaned the spark plugs and removed and wiped off the O2 sensor on the header, figuring that the plugs and sensor might have gotten fouled with unburned fuel. No joy. Is there another valve/sensor that would have been fouled by the unburned fuel, or do you have other thoughts?

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Saturday, February 18th, 2012 AT 11:10 AM
Tiny
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What codes do you have now?How high is the car idling?How many rpms?What kind of spark plug do you have in the engine?Not platnuim ones I hope?

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Saturday, February 18th, 2012 AT 4:23 PM
Tiny
1999SL2
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No check engine light, yet. 2000, but up to 3000, sporadically. Stock Saturn dealer ones (?)

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Saturday, February 18th, 2012 AT 4:39 PM
Tiny
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With that high of a idle I would check for vacuum leaks first.

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Saturday, February 18th, 2012 AT 10:14 PM

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