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Old 09-07-2009, 10:14 AM   #16
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Also, the fuel coming in to your engine will be colder then after a lap of running. This will cool the motor alot as well, giving you the rich motor feel. Once the new fuel warms up, the motor acts fine. Its normal.
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Old 09-07-2009, 10:27 AM   #17
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Normal maybe for a slidly rich engine. In my case costs positions. When i say rich i mean RICH barely running and staying ''alive''.
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Old 09-07-2009, 10:27 AM   #18
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Originally Posted by Integra View Post
tank lid closing too fast...
I know
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Old 09-07-2009, 10:49 AM   #19
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Originally Posted by 22Racer View Post
Your tune could also be off some making this problem worse. Probably too rich on the bottm and too lean on top. Does the motor come in for a pit stop with a high idle?

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Old 09-07-2009, 07:43 PM   #20
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Originally Posted by ezveedub View Post
Longer pressure line or Mugen pressure chamber will sometimes help to prevent this. The chamber will add volume to the pressure line and absorb the high pressure build up or spike of snapping the lid shut with a full tank.
+1 on the longer pressure line. 6 inches is pretty short. I had a similiar problem as yours and going longer on the pressure line helped. I'd try 12inches of line and see if it gets better.
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