BMW M coupe missfire !

[bmwboy1]

I only had the S50 m coupe serviced at bm a month ago and now its started to missfire just below 2000 revs!

Problem is ,in my wisdom I decided not to re-new the warrenty which expired 4 days ago

Just my luck!

Has anyone else suffered a similar fault?

Its the same lump as an e36 m3evo (S50)its more apparent in the higher gears when you accelerate from
1 to 2000 revs then it seems to clear after that.

Any ideas guys?

Many thanks!

[stevieturbo]

Coil packs are a common fault.

Buy one new one, and change each coil pack in turn until you find the faulty one.

Its unlikely the fault will be visible to the eye, although there may be some cracks around the tip of the coil where it seats over the plug

[DeltaFox]

stevieturbo said:

Coil packs are a common fault. Buy one new one, and change each coil pack in turn until you find the faulty one. Its unlikely the fault will be visible to the eye, although there may be some cracks around the tip of the coil where it seats over the plug

With you on this one.

[bmwboy1]

Thanks guys! ill give it a try.