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Old 07-29-2011, 11:23 AM   #1
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High rev madness!! Help!

I just finished up putting Performance distributor, gaped the plugs .065, header and a jet II chip on and when I started it up it wanted to idle at 2 and worked it's way up to 3k until it hit op temp and I shut it off. It instantly burned all the new paint off the exhaust. I pulled the jet pack and tried again and it stayed a 2k rpm. Could the spark gap cause this?

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Old 07-29-2011, 11:30 AM   #2
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Your intake manifold was not reseated properly against the head, it is leaking and causing the high rpms. Carefully reposition the intake manifold against the head, noting the positioning studs on the head the header has to be positioned over, retorque and your problem will be solved.

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Old 07-29-2011, 11:34 AM   #3
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Thanks I'll give it a shot once it cools back down
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Old 07-29-2011, 03:39 PM   #4
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You are a damn genius!!
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Old 07-29-2011, 03:42 PM   #5
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Thanks a million!!
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Old 07-29-2011, 07:23 PM   #6
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even with the upgraded ignition i dont think you need to run your gap any bigger than 0.05 because the spark gap will grow bigger overtime anyway and you want to make sure that you stay within the .035 to .065 range of your now coil and wires. Also, you make have trouble with high rpms as the coil gets older if you have too large of a plug gap.
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Old 07-29-2011, 08:50 PM   #7
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So that would probably explain why its missin a bit and im loosing power around 4thousand RPM?
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Old 07-29-2011, 09:05 PM   #8
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Quote:
Originally Posted by aj_40_9 View Post
So that would probably explain why its missin a bit and im loosing power around 4thousand RPM?


Power on the 4.0 drops off around 3k.
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Old 07-29-2011, 09:11 PM   #9
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Power on the 4.0 drops off around 3k.
im rockin a 2.5
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Old 07-29-2011, 09:14 PM   #10
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Quote:
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im rockin a 2.5
Then I imagine it's about the same or lower.

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