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1999 Buick LeSabre Custom 3.8L Misfire
Posted to GM Driveability on 1/11/2006 33 Replies

I have replaced spark plugs--still have miss fire on #4 tried new wire and new coil. scoped the wire secondary pattern is way different than the ones firing good..Question is can the ign module cause a miss fire under load but fire good at idle?

it really sou...

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  Related Documents & Media  1999 Buick LeSabre Custom

 
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car Vehicle Data

1999 Buick LeSabre Custom

VIN [No VIN Available]
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsMisfire
OccursUnder Load
Misc.Has Factory A/C

Trouble Codes

#4
Message Closed w/FIX

car Vehicle Data

1999 Buick LeSabre Custom

VIN [No VIN Available]
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsMisfire
OccursUnder Load
Misc.Has Factory A/C

Trouble Codes

#4