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Weird misfire readings
Posted to Technical Discussion Forum on 9/16/2013 20 Replies

2003 GMC Sierra 1500, Ignition Scan Data

Got a weird one here, Scanner is showing misfires on 1, 5, 6, 8 yet no misfire is felt. If I unplug #8 coil the misfires stop on all cyl's except #8(obviously). I have swapped #8 coil and wire with #4 cyl with no dif... Login to read more.

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car Vehicle Data

2003 GMC Sierra 1500 4.8L

Engine4.8 L
Trans4-speed Automatic (Electronic)

car Vehicle Data

2003 GMC Sierra 1500 4.8L

Engine4.8 L
Trans4-speed Automatic (Electronic)