Advise needed please

Advise needed please

Author
Discussion

Twazz

Original Poster:

6 posts

51 months

Tuesday 27th October 2020
quotequote all
Hi folks. I have a 2010 z4 35i and have fault code 29E0. I know this means I'm running lean somewhere. I have Carly and was wondering if there is anything specific I should be looking for in live parameter data that could point me in the direction of the cause. Any feedback would be appreciated. Cheers
P.s car has had engine rebuild a couple of months ago, has new plugs, coils and pre cat o2 sensors.

E-bmw

9,075 posts

151 months

Tuesday 27th October 2020
quotequote all
First obvious things to check would be to look for intake air leaks & exhaust manifold gasket etc.

d_a_n1979

8,008 posts

71 months

Tuesday 27th October 2020
quotequote all
Twazz said:
Hi folks. I have a 2010 z4 35i and have fault code 29E0. I know this means I'm running lean somewhere. I have Carly and was wondering if there is anything specific I should be looking for in live parameter data that could point me in the direction of the cause. Any feedback would be appreciated. Cheers
P.s car has had engine rebuild a couple of months ago, has new plugs, coils and pre cat o2 sensors.
As E-BMW said above; you need to check the air intake side carefully and see if there are any splits/loose connections letting extra air in after the MAF; this is generally the main cause of lean codes...

If that's all OK; maybe give the MAF a clean with dedicated MAF cleaner and see how it runs then also

Twazz

Original Poster:

6 posts

51 months

Tuesday 27th October 2020
quotequote all
Cheers guys. No very clued up about this stuff but I'll look into it and give it a go 👍