lean afr's when holding revs at idle.....

[meet07]

Noticed that when I hold revs at idle the afr's are really lean. Like around 18-20 lean. What can I adjusted to correct this?

setup:
rb25 series 1
-z32 repinned board
-forged bottom end
-q45 tb
-stec manifold
-BW s366
-ford lightning maf blow trough
-3 inch ic piping
-freddy intake manifold

[Matt]

Check latency which will affect lower rpms, fuel map and you can pull ttpmin values higher if both those ok

[meet07]

So I would need to increase the latency correct? And I tryed to tamper with the ttpmin but it didnt change anything..Ill try both here in a little bit. When the engine is cold and I hold the rev's the AFR's look good...

Thanks

[meet07]

I adjusted the ttpmin but rom 7-8 there is a drastic change in the afr's. 7 is at 18afrs and 8 is at like 12-11.0 afr's

[Danielmcn]

Did you adjust the latency at all?

[bachig24u]

make sure ECU is in open loop if possible.