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Misfiring! Need Help!

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Old Jul 6, 2004 | 05:33 PM
  #1  
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Default Misfiring! Need Help!

I have NGK TR6 plugs with MSD wiring and the plugs are gapped at .035.I have a 6psi PD supercharger on it. When i started it up i keeps getting misfires. Is the gap ok for this setup or do i need to change it and if so what to? Do i need to program it so i can run the plugs at these gap? need HELP!

Mods:
Hookers LTH and Y pipe
SLP loudmouth Exhaust
Powerdyne 6psi Supercharger
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Old Jul 6, 2004 | 06:07 PM
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That's the same plug and gap I had on my PD setup with no issues. It is probably something else.

-Geoff
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Old Jul 6, 2004 | 06:13 PM
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I'm having the same prob with cylinder #7. I'm going to check the plug wire, plug, and coil for proper spark. I don't know if your misfire is just on one cylinder or all of them but it might be some things to check out. ???
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Old Jul 6, 2004 | 10:09 PM
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#7 is usually the first cylinder to let go so be prepared for the worse guys.

Also .035 is a little tight for only 6psi, I'd open the gap up to .040
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Old Jul 6, 2004 | 10:21 PM
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Originally Posted by MYTURBOT/A
#7 is usually the first cylinder to let go so be prepared for the worse guys.

Also .035 is a little tight for only 6psi, I'd open the gap up to .040

Hah, that's funny. I don't think any one cylinder is typical of "letting go" but I've never had an engine go bad so I'll keep you posted. I'll be prepared for a plug wire or a rocker arm at worst.
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Old Jul 6, 2004 | 10:24 PM
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I have seen misfire directly relate to the cylinders that had cracked ringlands.
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Old Jul 7, 2004 | 06:04 AM
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Originally Posted by MYTURBOT/A
#7 is usually the first cylinder to let go so be prepared for the worse guys.
That was my lucky number on my original motor. (melted piston)
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Old Jul 7, 2004 | 06:48 AM
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Same good luck here,cracked ring land #7 cylinder. Yeah from what I was told the #7 cylinder takes the most abuse from FI. Good luck
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Old Jul 7, 2004 | 01:51 PM
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Mine was #7 also. must be a coincidence.
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Old Jul 7, 2004 | 04:31 PM
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I've heard #7 seems to lean out first due to manifold design.

Or maybe it is crank/TQ related?
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Old Jul 7, 2004 | 05:01 PM
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Well I broke piston #3. So who knows..
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