So I've been having a problem I can't seem to figure out. Whether the o2 feedback is on or not, say I'm accelerating, or cruising, doesn't matter, and I put the car into neutral, the AFRs will go full lean (decel) like normal for a second, and then when the rpms hit 1k and the idle tables catch, the AFRs go rich to about 12.5-13.0 for about a second before it goes back to stoich. Just regular idle with o2 FB off has idle at 14.7-15.0, so its not a fuel table problem. I was playing with some of the dTPS tables but can't seem to pinpoint this problem.

I'm using a 1052 AEM box with the AEMPro software.

Any tips/help/advice would be great!

Thanks

 

thats pretty normal. even happens with the stock ecu.

what rpm do you have fuel coming back in at?

 

Agreed. If I had to guess its because there's a split second or two where the throttle is completely closed but there is still some extra fuel being combusted from the previous combustion events when air was still coming in.

 

Whole thing happens at 950 +/- 50rpms (normal idle)

I guess I just dont remember seeing this on stock ecu. What spectacle said makes sense, it does seem to go richer the harder the accel event previously was, and on light cruising if I pop it into neutral, it will still go rich, but maybe like 13.5-13.8 instead of low/mid 12s.

 

Yeah, that sounds normal to me from what I've seen on my own car. N/A and Turbo.

 

Yep, normal.