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  1. Gen1 1.4L Turbo
    So after talking to vince yesterday, I started thinking hard using all the knowledge I have about automotive. I wondered if all the timing was being pulled because of the higher altitude and my spark gap. I've known drag racers with cobras who have had to run really low gaps to not only prevent...
  2. Gen1 1.8L
    So I decided it was time to regap my plugs. All plugs are at roughly 0.025+/- so I'm setting them all at .035 I noticed when I took my plugs out they are all black and the tips are white. Is this normal? I ask because on a snowmobile black would be a bad thing, you would want a brownish...
  3. Gen1 Powertrain
    i finally took the advice of a few people on this web site and pulled my plugs to check the gap. i was very surprised that they were right!!! the gap was anywhere from .018 to .021 far below the .035 that is needed. after re gaping and reinstalling them i was very surprised at the low end...
  4. Gen1 1.8L
    I recently changed plugs to Auto Lite Iridium and gapped them at .35 and my MPG improved. I went to check them after a few months and I replaced since one broke. I gapped those at .28 and it seems my MPG went down a little. I read about coil stress that is why I went back to the .28. My...
  5. Gen1 1.4L Turbo
    Friend of mine who is tuned by Trifecta asked me to regap his plugs for better fuel economy. Plugs on this car are so simple to do, it's not even funny, anyone could change them in 10 minutes. Waited till overnight cold, pulled them and regapped to .033" No issues running without tune...
  6. Gen1 1.4L Turbo
    When pulling my coil rail off very gingerly, I noticed inside the boot the springs were catching off to the side, probably slightly stretched when being pulled out, and then recoiled back once they popped off the plug tip and caught behind a lip further up in the boot... I had to take a tiny...
  7. Gen1 Powertrain
    If you changed your spark plug gap per this thread or this thread, please report what the original values were here. If you have yet to change them, please remember to report the original values. My case with GM has been escalated to a district case manager at GM to hopefully get some exposure...
  8. Fuel Economy
    In another thread, I talked with a member named Ian_12 regarding spark plug gap. He informed me that he increased his spark plug gap from .029" to .034". The result for him was a significant improvement in fuel economy. I have little experience with changing spark plug gap, so I figured...
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