[WSU_Coug]

Hey all, I've had intermittent SES for awhile and finally got the Carly adapter / app so I could pull BMW specific codes.

I knew the upstream NoX sensor was going bad but not sure where to start with the others.

I have noticed the last couple of weeks that it sounds real "clatttery" under light acceleration around 1500rpm when warmed up. Even that though is intermittent, sometimes more noticeable than others.

I also had a crank but no start several weeks ago. After several attempts I let it sit 5 mins and tried again, it instantly started right up like there was no problem.

Anyway, any insight is greatly appreciated!

Oh - it's a 2009 335d with 65k miles. Never done CBU cleaning.

[Yozh]

Smoothness are most likely because of a CBU. At least they go hand on hand. Clean you metering valve to start. Replace Glow plug module.

[WSU_Coug]

Originally Posted by Yozh

Smoothness are most likely because of a CBU. At least they go hand on hand. Clean you metering valve to start. Replace Glow plug module.

Thanks Yozh, sounds like I may need to pull the EGR and try to use a borescope to check for CBU (unless there's a way to check with Carly)

Do you think the glow plug module could cause the crank but no start issue I had a month ago? Figured I probably have a lift pump or module problem since the car was warmed up and had been sitting for 10 mins after I ran into the store.

[335dlci]

Originally Posted by WSU_Coug

Thanks Yozh, sounds like I may need to pull the EGR and try to use a borescope to check for CBU (unless there's a way to check with Carly)

Do you think the glow plug module could cause the crank but no start issue I had a month ago? Figured I probably have a lift pump or module problem since the car was warmed up and had been sitting for 10 mins after I ran into the store.

You will need to remove more than just the egr valve. You need to remove the whole manifold.

[BB_cuda]

You can’t feed a borescope through the manifold. The swirl flaps block the larger side passage. It’s just easier and no mystery if you pull the intake off. When I tried boroscope, the lense kept getting black crud all over it and I couldn’t see.
If nothing else, you can see that ports okay and go ahead and clean intake out with purple power solvent.

[WSU_Coug]

Originally Posted by BB_cuda

You can’t feed a borescope through the manifold. The swirl flaps block the larger side passage. It’s just easier and no mystery if you pull the intake off. When I tried boroscope, the lense kept getting black crud all over it and I couldn’t see.
If nothing else, you can see that ports okay and go ahead and clean intake out with purple power solvent.

Ok may give removing the intake a shot over the weekend, appreciate the help guys.

Would you all think a faulty glow plug controller could have caused the crank but no start last month (outside temp was 80 degrees and car was only sitting for 10 mins after a short trip to the store)?

[PerfectAce]

Originally Posted by WSU_Coug

Would you all think a faulty glow plug controller could have caused the crank but no start last month (outside temp was 80 degrees and car was only sitting for 10 mins after a short trip to the store)?

Nope. You likely wouldn't notice anything out of the ordinary with the glow system at those ambient temps (and a decently warm engine.)