Question about 1997 BMW M3

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97 M3 chokes on clold start.

My 1997 M3 3.2L chokes on the first shot of gas i give it when i put it in drive after starting it when it's been sitting for a few hours. Only when it's been sitting for hours ! And only when i put in drive ! I could start it and rev it fine but when i put it in drive it chokes the first shot of gas i give it, i let go and give gas again and it runs fine ! It wont do it again untill it sits for a few hours.

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Had the same problem..After talking to a mechanic of the BMW dealer, I followed his advice and started fueling a higher octane (unleaded 98), since using this fuel never had that "problem" again.
He(the machanic)said it is the motor management chip adjusting the engine to run smoothly on "cheap" fuel.
So if you too don't want that problem anymore, tank the higher octane.

Posted on Mar 03, 2009

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The E36 M3 is natorious for having some minor enigine hesitation immediately after a cold start. My car does this for about the first block both in the morning and after work. Its part of the engine management start routine: you will see this more specifically if you just start you car when its cold and let it idle. Initially you'll notice that the idle tone is a bit more rumbly and rough; but after about minute or so you'll notice that pitch changes and smoothes out. I was alarmed about this too, but after some research, I found it was a characteristic of the design. Just take it easy for the first block and you will never notice. Don't ever cold rev your engine. - Hope that helps.

Posted on Oct 20, 2008


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