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    jerky...

    When i drive my car at half throttle, i feel continuous a jerk for a long time. i bought a new vxr turbo and bcs. but the problem is still going on. my car has vxr injector, custom complete exhaust system and remap. Which parts can be cause of a problem (jerk)?

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    Spark plugs or coilpack causing a slight misfire?

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    today i'm feeling a problem at full throttle

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    Try changing the usual suspect, the AFM.

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    Was it mapped for the VXR injector's? or have you just fitted them recently?
    Astra SRi Turbo
    281|317

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    Unplug the AFM and if you still have it you know it's not that!!

    Also as Kris said ^^ has it been mapped yet?? and as per Buckle plugs and coil pack are common for back fire /miss fire..

    I had this problem and it was my plugs, try some new ones it can't hurt and is the cheapest option!!
    FORMERLY WAVEYBLUEWATER

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    yes it was mapped. i'm using bosch F5DP0R spark plugs. my tuner is recommend this spark plugs. what is your recommend for me?

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    Denso IK24 or NGK BKR6EIX also if you are running pretty high boost then get them gapped to .67mm or thereabouts
    FORMERLY WAVEYBLUEWATER

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