R60 high RPM sounds like backfire

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Apr 12, 2019 | 01:28 PM

minicountrymanS

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high RPM sounds like backfire

Recently my CM S feels like hesitation or backfire whenever I press heavily on the gas peddle (high RPM)

Any one have any idea, I was thinking of a bad plug or bad coil, no codes.

The car is running Stage2 ….. normal driving everything is fine.

Thanks

Apr 12, 2019 | 01:39 PM

MarioKart

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From: Ventura, CA

Quote:

Originally Posted by minicountrymanS

I would look at plugs, coils or HPFP.

mQubed Motorsport Manic & RPM Power Tuning

Apr 12, 2019 | 03:33 PM

minicountrymanS

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Great, thank you so much Mario, I will start with the plugs and then coils … the HPFP was replace under warranty a couple of years ago.

Thanks a million

Patrick

Apr 19, 2019 | 04:52 AM

minicountrymanS

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Just replaced the plugs with an old set I had kept, they solved the problem, will be ordering a new set.

Great forum thanks again Mario.

Apr 19, 2019 | 08:08 AM

MarioKart

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Quote:

Originally Posted by minicountrymanS

Just replaced the plugs with an old set I had kept, they solved the problem, will be ordering a new set.

Great forum thanks again Mario.

i love a simple fix.

mQubed Motorsport Manic & RPM Power Tuning

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May 3, 2019 | 09:51 PM

Alpha Motoring

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From: Bel Air, California

Glad to hear it’s resolved. Many times it won’t show a fault but will show a fault when plugged into a BMW diagnostic software like ISTA, etc.

May 4, 2019 | 05:15 PM

minicountrymanS

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Today's update, this morning I replaced the 4 coils (with OEM ones) and that finally corrected the backfires at high RPM.

The Ponies are back on my CM stage 2.