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misfiring under load. no codes

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Old Feb 15, 2008 | 08:55 AM
  #1  
12leavu's Avatar
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From: south alabama
Default misfiring under load. no codes

here is exactly what is going on. the car runs fine at all times idle,WOT,city driving, ect...except in overdrive at low rpms..1200-1600 if i lightly press the gas is starts busting up. sometimes pretty bad, sometimes you can barely notice.(doesnt matter engine temp).. it hasnt thrown a code yet. i first changed the plugs and plug wires with no luck. then i installed new o2 sensors. no luck there either. any suggestions?
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Old Mar 26, 2008 | 08:54 PM
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From: Meridian, MS
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maybe get a decent tuner???? who tuned it?
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Old Mar 26, 2008 | 09:16 PM
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What octane fuel are you running?
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Old Mar 27, 2008 | 03:11 PM
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From: eastern ky
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possibly could be a clogged fuel injector?
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Old Mar 27, 2008 | 03:13 PM
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Is there KR present during this event? Lugging low RPMs in high gear will often lead to KR, especially if the fuel is not top notch.
May need to do some logging here....
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