stumbling pontiac

[fxyldytc]

my 1996 pontiac grand am stumbles once in a while ... happens most of the time in overdrive at around 55 miles an hour. have noticed it to do it once in a while at a lower speed in third gear. i have replaced trans filter, gas filter, seems to be better since changing the trans filter out. had a scan done by a pontiac dealership they come up with nothin wrong. does any one have any info?

[97grandamld9]

what motor?

[fxyldytc]

Originally Posted by 97grandamld9

what motor?

2.4 L also is an automatic

[maxwedge]

This can be an ignition problem, only happens under load, possible coil, or plugs.

[97grandamld9]

yes, this sounds ignition related. Try replacing the coil housing cover, they are about $40 at a parts store.

[fxyldytc]

thanks, i will look into that