Thread: N54 Backfiring?
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      07-11-2011, 07:16 PM   #9
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Drives: 135i Silber mit/Rot 6MT N54
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Originally Posted by IGoFast1589 View Post
Backfires come from a rich mixture, Dackel...

That is a myth - I believe.

I have had some tuning experience with SW tuning (on Volkswagens and Porsche's)many years back, in the early 1990's. Most of the time a popping back fire is from running too lean a fuel mixture. I know common sense says its must be too rich of a mixture... but it is more common for it to be from a lean mixture.

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