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Old 02-05-2012, 03:35 PM   #1
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tune

After I loaded my new jon lund ghost cam tune I noticed that if I rev over 4,000 it makes a loud backfire pop sound. Does it just need a little more time to adjust to the new tune? Any ideas on Wut it is?
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Old 02-05-2012, 03:47 PM   #2
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Yea it's probably such an aggressive tune that the cams overlap is too long and it's backfiring. I'm sketchy about that tune.
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Old 02-05-2012, 03:49 PM   #3
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So it just takes some time getting used to?
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Old 02-05-2012, 04:07 PM   #4
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If its back firing the intake valve is open when the combustion takes place. The timing is advancing to far. You need to call them it will not get better on its own.
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Old 02-05-2012, 04:09 PM   #5
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Ok thanks man. I appreciate it
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Old 02-05-2012, 07:41 PM   #6
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Re: tune

If it is truly backfiring, I would say you are having issues. Call them have it looked at. Mine doesn't backfire. I do get a burbling from the exhaust when I let off the gas which is normal. I am just wondering if that is what you are hearing with the tune. My Harley does the same thing with its tune...only it is more pronounced with it since it has really short pipes.

I have the same tune and use my car as a daily driver with no issues what so ever. Good luck!
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Old 02-08-2012, 09:39 AM   #7
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They said everything running fine and looks ok. Since every things checks out good they said not to worry to much. I inly get the backfire if I revv 4000 rpms and up. Other than that it drives great and idles just fine. No backfire when getting on it or shifting just when I revv high.
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Old 02-08-2012, 03:42 PM   #8
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Quote:
Originally Posted by Supertzi
They said everything running fine and looks ok. Since every things checks out good they said not to worry to much. I inly get the backfire if I revv 4000 rpms and up. Other than that it drives great and idles just fine. No backfire when getting on it or shifting just when I revv high.
So it just backfire when like sitting and Rev above 4000?
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Old 02-13-2012, 02:35 PM   #9
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Yup that's it.
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Old 02-13-2012, 06:04 PM   #10
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That just sounds normal. I know a bunch that do it. Long not doing when driving and get on it
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