Quote:
Originally Posted by Bdc101
That's what I am fighting too. I replaced the air intake elbow yesterday but the old one didn't look bad. The code didn't come back today, but I'm gonna wait a week or so before I believe I fixed anything.
I also ordered my cooling system parts. Genuine BMW stuff is awful expensive on this car. I even cheaped out with a few OEM parts. I didn't even get the fan or clutch, or any of the smaller coolant hoses. Radiator, WP, T-stat, the big hoses, expansion tank, and it was still over $700.
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Quote:
Originally Posted by andrewwynn
Sticking / dirty fuel injector can give you rich codes. Usually intake problems give you lean codes (more air than measured gets into cylinders). I'm not sure how you get less air than measured from the intake side but I would look into throttle position sensor and disa if you have the six
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Agreed. The negative fuel trims exceeding 10% triggers the code CEL so I struggle with the theory that an intake leak is causing the issue. Too much air from an intake leak would cause the trims to go positive not negative.
I pamper this engine when I drive rarely exceeding 30% throttle and it never misses a beat, fires up smooth and runs smooth as silk so injectors are not on my radar yet.
As mentioned, I replaced the MAF with a Siemens unit and Bosch direct fit pre cat lambda sensors last August so I thought I had it covered. Maybe the fuel filter/regulator next?
