partial throttle lean, aristo 1.5jz in mk3

crazy3rdgen

New Member
May 2, 2015
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USA
Partial throttle out of boost, aristo ecu afrs lean. 14.2-14.5. Suggestions? I see there's a resistance check for the TPS I can do. In boost afrs are dead on across the board. Also at idle it seems to hunt for a steady afr a bit more than it should, 14.2-15.8. It's a 1.5jz swapped mk3. Also yesterday I let it idle up to temp, it went thru the warm up and stayed at 12.5, then I drove it and the idle went up to 14s 15 where it should. Maybe stuck in open/closed loop just odd
 

suprahero

naughty by nature
Staff member
Aug 26, 2005
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Roll Tide
14.2 -14.5 is no where near lean. My car idles at about 13.5-14.5, but only because it idles better when it's a little richer than 14.7
I don't see anything wrong with that. If there is, then my car is messed up too. What are you tuning with? Is it stock ecu or stand alone?