i wouldn't go so far as to reset the ecu, but cleaning the TBs definitely helps. i was having the same problem w/ my 08 g37s. I cleaned the throttle bodies w/ the cleaner, and whatever i could reach in the intake manifold w/o removal. I also used Seafoam for my fuel, oil, and thru my vacuum lines, and she runs like brand new.

 

Thanks fellas, I can try throttle bodies, but The Stillen Gen 3 was installed less than a year ago, and figured that they cleaned as the reinstalled cai. I still cant get a code to pop on a local shop.

 

still not resolved after a year?

experienced this and found mine to be a broken tab to one of the maf sensors.. it wiggled loose..

 

I had a similar prob with my stock '11 G37x with 20K on it so I replaced both throttle bodies and now the battery is dead...is it possible for the TB sensor to drain the battery??