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Discussion Starter · #1 ·
So I had this issue before and it somehow went away and came back so I said screw it and bought a new maf, reset the ecu this morning and started driving. Af learning 1Awas a little lean. But B,C,D were all pegged at 0.00 when I was on the gas. Got to work and at idle the af learning jumped up to +17.xx any ideas as to wtf is going on here?
 

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What's normal idle afr for the fa20?
 

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Discussion Starter · #4 ·
The other possibility I'm leaning leaning towards is maybe the upstream oxygen sensor? Gas mileage has decreased for awhile now even before I added the DP to the car
 

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I would check for a leak post mad. The turbo Iinlet is common.

When my sensors went my aft dumped way rich.
 

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Discussion Starter · #6 ·
I installed a Perrin turbo inlet when I first had this problem because I noticed the stock one was torn so I'm kinda frazzled that it's happening again
 

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Make sure everything is sealed. You may have to smoke test
 
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