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Old 02-01-2010, 02:27 AM   #41
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Got the belt replaced this weekend, 730 was a tight fit but it was a fit. I took it out for a test run hoping to finally get to see what she could do. No more belt slip, but now it'* giving me the same type of high rpm misfiring I was getting a while back. I'm assuming its got to be the MSD coil packs again. I've got a brand new set of stock coil packs I'm going to swap in when I get it back out of the shop.
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Old 02-01-2010, 08:18 AM   #42
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I've chewed through a couple stock coils over the years.... coil pack issues are easy to fix, but soooo annoying.
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Old 02-01-2010, 08:31 AM   #43
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High speed misfire could be preignition. What kind of plugs are you running?
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Old 02-01-2010, 10:19 AM   #44
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Oh snap..I breezed through that.

Only high rpm?
Yup..plugs like Dan said.
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Old 02-01-2010, 10:24 AM   #45
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I was working on a supercharged Lotus and he had the same problem. A sputter at high RPM. I suggested colder plugs and the problem went away.
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Old 02-01-2010, 12:17 PM   #46
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High speed misfire could be preignition. What kind of plugs are you running?
I'm running 103'*. Maybe too cold?
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Old 02-01-2010, 12:19 PM   #47
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That is a bit cold, 104 would be better. I don't expect a cold plug to cause a stutter. Are you picking up any KR?
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Old 02-01-2010, 12:21 PM   #48
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That is a bit cold, 104 would be better. I don't expect a cold plug to cause a stutter. Are you picking up any KR?
No KR , although I am running 10lbs through stock manifolds...
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Old 02-01-2010, 12:22 PM   #49
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It'* possible your backing up in the exhaust.
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Old 02-01-2010, 12:25 PM   #50
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I've been talking headers with Trent, and I'm liking the two piece design of the ZZP stainless headers. I should be able to have a set of headers delivered before the car comes back out of the shop.
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