North American Motoring - R60 high RPM sounds like backfire

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minicountrymanS

04-12-2019 01:28 PM

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

MarioKart

04-12-2019 01:39 PM

Quote:

Originally Posted by minicountrymanS (Post 4463129)

I would look at plugs, coils or HPFP.

mQubed Motorsport Manic & RPM Power Tuning

minicountrymanS

04-12-2019 03:33 PM

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

minicountrymanS

04-19-2019 04:52 AM

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.

MarioKart

04-19-2019 08:08 AM

Quote:

Originally Posted by minicountrymanS (Post 4464403)

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

Alpha Motoring

05-03-2019 09:51 PM

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.

minicountrymanS

05-04-2019 05:15 PM

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.

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