Quote:
Originally Posted by Kwike92M3
I would start with looking at items that affect BOTH banks, IE MAP sensor, low pressure fuel regulator, etc.
However, short term fuel trims DO give valuable information on what to expect of long term fuel trims, so that info could be helpful.
I wouldnt say O2 sensors simply because different upstream O2s control either side of the engine.
Are you getting a check engine light with P0172/P0175, or are you just tinkering with data?
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No CEL, just reading my PID data looking to optimize my engine, trying to get trims within +/- 5%. How do I troubleshoot the MAP sensor? I have a variety of OBD scanners and software/apps including a OBDLink MX+, BimmerLink, Foxwell NT530, K-DCAN/laptop, ISTA, etc.
STFTs don't seem too wild, LTFTs are the issue.
I believe the pressure regulator is in-tank?