E89 - Cylinder 2 Misfire - Fault Code 29CE

[vpatel27]

Car Make - BMW
Z4 35i E89 - 2009

Hi

I was wondering if anyone had a one off Cylinder 2 misfire?

I feel like the car is a little lumpy on idle or when just cruising, so got my other half to drive it to see what he thought.
He took it for a blast, switched to manual when getting onto short motorway and put his foot down, took her too about 5800 rpm.
She started to judder, got confused on gears and then sorted herself out.

Got back home, I plugged in Carly and got Misfire, cylinder 2 injection = 0029CE
there was also Catalytic conversion - 0029F4 and Cat Conversion 2 - 0029F5.

I took her out today for a short run, got her up to 6000rpm in 2nd gear and she was ok.

I just got the water pumped changed so not looking forward to another costly repair.

I was just wondering if anyone had any experience of one of issues like this or should I be preparing for more spending lol

Thanks for any help in advance

[NoQuarter]

You are just at the beginning of this becoming a more persistent problem.

Prepare in advance and order a set of plugs and a couple coil packs to have on hand.

[vpatel27]

Oh no What!?
Can you please explain why you think this?

[Lurcher]

Typically around 30k miles these motors start having ignition issues (plugs/coils). You don't mention how many your car has.

Mines in the shop for a similar issue (32K miles)...

Consider it preventative maintenance...

[vpatel27]

Oh ok
Mine as about 72k on the clock now, so well past the 30k marker. I haven't had it from new though

[jawolf]

I had a similar problem on my 2011 Z4 (60K) and it turned out to be the coil.
Since you have a code reader just swap the suspect coil to a different cylinder, which takes about 15 minutes and clear the code. If the cyl. changes then you know it is the coil which is about $40.

[rking117]

Originally Posted by Lurcher

Typically around 30k miles these motors start having ignition issues (plugs/coils). You don't mention how many your car has.

Mines in the shop for a similar issue (32K miles)...

Consider it preventative maintenance...

Im not sure that i can agree with your statement. I dont think mileage will cause the breakdown of a coil pack or other ignition issues. My vehicle has 90+ K on it and no coil or ign issues. I hope that doesnt change any time soon. Now as for the original diag for the OP i think the coil pack for #2 maybe be the culprit. Certainly there are variables in part issues. Things like nominal temperature, manufacturing process, maybe wear of use i could get (mileage) even though none of these can be used as a standard.

I suspect that if you reset the code and it comes back then replacing the coil pack will likely fix the issue. However, I DO recommend to replace them in sets. Yeah i said it. All 6. sorry.

[vpatel27]

So I have been to my mechanic and since she running ok at the moment he has put in an Injection Cleaner which I have run through on a long journey and I will be filling up again soon.
So just keeping an eye on it, she needs to go into mechanic for Brake Fluid anyway so he is going to check it out.

He did say it could the start of an injector issue, but he will recommend the cheapest option first.
Will keep you posted on what happens

Thank you for your comments, any experience helps here