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  1. Z

    HPFP: pressure holds @ 1600 psi during cold start for about 20 seconds

    Recently installed Autotech HPFP upgrade when doing a timing chain on my MS6 (no real mods yet, just running an Accessport Stage-1 pre-canned tune). Dissembled and cleaned everything that the instructions called for during the installation. Now upon cold start the pressure surges to 1600 psi...
  2. Z

    Timing Chain (I think) noise when hot, 60K miles after VVT replaced

    I replaced the VVT with a full OEM kit @ 49K miles due to noise at start up, and the TSB recommending the updated VVT actuator. I now have 110K and I am now getting a lot on noise when the engine heats up that I believe it is the timing chain (It sounds like a diesel engine at idle). I can...
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