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View Full Version : RB25det acting a little funny under boost


akamal92
06-06-2012, 09:06 PM
first of all let me give u guys my mods list..
2.5 inch intake
3inch exhaust turbi back
freddy intake manifold
q45tb
external fpr set to 43psi at idle (vac on)
mls hg
arp studs
fmic
irdium plugs
afc neo (not tuned) but runing 7-8psi stock turbo

so my problem is that im getting crazy lean afr on idle like 16.4-18(aem)
and wen i boost the afr are all over the place and its just a stock
boost setup do i just need a tune or it could be something else
cuz on rev im building boost also like 4 pounds sometimes and idk why