engine problem

1999 NISSAN MAXIMA
75,000 MILES • 6 CYL • 2WD • AUTOMATIC
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MSHMORG
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my 1999 nissan maxima starts missing and sometimes backfires after being drinen about 5 miles.
Nov 29, 2010 at 9:50 PM
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KHLOW2008
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Were the spark plugs, ignition coil and fuel injectors checked?

Is the Check Engine Lamp indicating?
Nov 30, 2010 at 3:21 PM
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MSHMORG
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The engine chech light came on instantly and went off after it had missed a few times. not ater that. I have had 3 or four coil packs replaced previously, but it acted differently--more severe miss firing. It only happens after the car heats up after driving 4-5 miles. Then if I let it sit for a while, it seems ok, hen after a while starts acting up again. The gas has been in the car for about 3 months since I haven't driven it much lately.
Nov 30, 2010 at 7:49 PM
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KHLOW2008
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You would have to plug the vehicle onto a scope to check the conditions of all component when it is misfiring.

As problem only occurs after warming up, it could be a failing sensor. Try to get a scan done to see if there are any trouble codes stored in PCM>

Nov 30, 2010 at 8:10 PM
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