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  1. #1

    Default Crank sensor out of time with cam sensor?

    I picked up a misfire on my 2003 1500hd 6.0 when put under a light to moderate engine load mainly around 2500 rpm. Never got a engine code but with my live data scaner I was able to pick up #1 cylinder misfiring the most along with #5,#6, and #8 evey now and then. I took it to the gm dealer and they said that the crank sensor out of time with the cam sensor. The way I understand it all they did was reset the pcm. How does this happen? They could not give me a good answer. My friend has the same motor and year of truck and he has had the same issue. Sad part about it I change my spark plugs and wire again(only has 6000miles on them) and cost $150 and gm charged me $75 to reset the computer.

    2003 Chevy 1500HD 4x4 6.0L Crew Cab
    4.56 Gears
    4L80E Transmission
    K&N Cold Air Intake
    Power Aid Throttle Adapter
    3" Leveling Kit
    295/75R16 Nitro A/T Tires
    Westin Nerf Bars

  2. #2

    Default

    What type of spark plugs did you install? Most on this site have found GM's run best with A/C Delco's. Some have found that non-A/C Delco plugs can cause misfires.
    :cool:

    2005 Chevy Silverado Z71 Crew Cab
    6" Skyjacker lift w/Edlebrock dual front remote resoviour shocks, single rear remote. Rancho skid-plate.
    17" x 9" M/T Classic Lock Wheels, 35" BFG A/T or M/T tires
    4.10 PercisionGears w/factory locker, T/A Performance rear-end cover
    Banks CAI intake, ported throttlebody, JBA coated headers, over-sized Magnaflow cats, Magnaflow cat back exhaust, Diablo tuned
    B&M aluminum deep transmission pan
    Warn brush guard w/Warn 9.5 XP winch, PIAA bulbs, Line-X bedliner, AWS Black tool chest, Extang tonneau cover
    Weather Tech floor mats
    Cover-Craft seat covers
    Dash mat cover
    Formula One window tint
    One black Lab in rear seat.
    :glasses:

  3. #3

    Default

    I always use acdelco spark plugs.

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