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alpax · 03-09-2015, 03:28 AM

I cleaned the fault codes and logged some more data. The difference in fuel trim values is crazy!

Before:

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After:

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No wonder I got those fault codes - looks like normally the trims have to be around 0, LTFT at +/-5%, and I had that around -5%...-35%, which is way off!

Well, now after replacing the MAF sensor O-ring, I'll be monitoring the behavior. Keeping my fingers crossed...

03-09-2015, 03:28 AM	#1717
alpax Member Join Date: Apr 2013 Drives: 2013 Subaru BRZ AT JRSC Location: Vancouver, Canada Posts: 56 Thanks: 27 Thanked 20 Times in 10 Posts Mentioned: 0 Post(s)	I cleaned the fault codes and logged some more data. The difference in fuel trim values is crazy! Before: After: No wonder I got those fault codes - looks like normally the trims have to be around 0, LTFT at +/-5%, and I had that around -5%...-35%, which is way off! Well, now after replacing the MAF sensor O-ring, I'll be monitoring the behavior. Keeping my fingers crossed...