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BMW 3-Series (E90 E92) Forum
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Loud backfire at end of a pull ?
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07-09-2023, 10:08 AM | #1 |
First Lieutenant
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Rep 315
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Loud backfire at end of a pull ?
Anyone have a loud backfire letting out of the gas at the end of a pull, esp in fourth gear? Is it in ur new fuel or what? No codes
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2010 335XI, Carillo Steel rods, JE pistons, Closed Deck, Stage 4 race heads, 6mt, Pure Stage 2 High Flows, B58 Coils, VRSF|Vu Brothers (Ft Worth, TX)|JSRTuning,
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07-09-2023, 12:02 PM | #2 | |
Lieutenant Colonel
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Rep 1,539
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Quote:
For how long you have the car? My tuned audi do this and my N55 stock with OEM exhaust valve always open do this too, and it's more savage than my tuned audi. |
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07-24-2023, 09:01 AM | #3 |
First Lieutenant
98
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This is a question for your tuner. They may be running rich at the higher rpm so the unburnt fuel mixture is causing said backfire. This is a configurable setting in MHD also to leave the injectors spraying off-throttle for a cycle or two while cutting ignition to give the kids "pops and bangs" tunes.
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