E46 M3 acceleration issues

[Nelly1980]

Hi Guys

Just picked up an e46 m3 a couple of months ago and have started having issues with really jerky acceleration in 1st and 2nd when accelerating hard. Car is fine when pulling away slowly or when it is already rolling (ie coming off a corner and flooring it). Haven't got a video of mine, but it is doing the same as this guy's m3

https://m.youtube.com/watch?v=tnkh2z72s-Q

Any ideas would be appreciated.

Thanks

[AW10]

Can you get any stored fault codes read?

[carbonblack]

I'd wager it was the coilpack(s) giving up

[mark.c]

Hard to tell but it sounds like the engine revs cleanly enough (despite being jerky). I think I would be looking at engine/gearbox and diff mounts to rule them out for a kick off.

[Nelly1980]

Thanks for the responses.

I haven't taken it to a garage yet and I don't have a code reader so not sure what codes are coming up (if you've got a recommendation for one to buy would be good as suspect it might be a useful purchase).

When I bought the car the coil pack had been changed about 6 months ago ( garage invoice was in the history) so I would hope that it is not that.

Gearbox/engine mount might be possible.

Could the MAF sensor cause it?

[mark.c]

I suppose the MAF could be a cause, I've had one before, albeit not on an M3, that felt like the car hit a brick wall long before the Rev limiter on a hard pull, under light load the car would rev cleanly.

I can't see a coil pack being the cause.

[Panthro]

Is it running rough at idle? Pretty sure that will be a misfire on a single cylinder. You need to check the ignition, compression and valve timing. Take it go a garage and they will be able to test all of these things for you. Hopefully it will just be a faulty plug or coil pack.

[Nelly1980]

Doesn't run rough at idle. Problem only occurs under hard acceleration. Otherwise the car seems fine.

Any recommendations for a garage near Wimbledon?

[Captainawesome]

hard acceleration at low or high revs?