Current mods are:
Catless downpipes
Full 3in IPE exhaust
VRSF Intercoolers
methanol injection without Jb4 map0
gapped ngk plugs
DME stage 2 tune
bcm with jb4
upgraded SSP clutches
afe cold air intakes
stage 1 turbos
Cold start delete
Probably something Im missing but nothing out of the ordinary.
The roughest cold start I've ever seen. The RPMs fluctuate by 5-600 rpms up to 1200 then drop back down to 600 continuously over and over until the engine stalls. 0 codes on the car but I've been getting around 6-8mpg and my cold start will always stall the car unless its being driven right away or revved. Its been getting worse with colder climate, but completely disappears after 1-2minutes of driving.
I've always been averaging between 6-8miles per gallon in city driving. Rarely go over 5k rpm in Manhattan, but I always try to use the entire RPM range every drive.
I believe the idle possibly has to be adjusted? any ideas on how to do this?