I don't know if anyone has noticed or if it is just me.... this is the same when i was NA and after i booted.. some days the car runs great.. during normal driving around 2000-4000 rpm i can feel the tq pull.. nice and smooth and i can feel the g.. but then some days it feels sluggish.. i am leaning towards the gas.. usually the car drives great but as soon as i refil the car the smooth power i felt before is gone.. but i get mine from same place and always 93 octane. Temp is irrelevant. some hot days feels better than cold nights..

Has any tuners seen this through their turning experience? is the ecu pulling timing?

 

"After you booted"? Did you mean boosted? What engine management are you running?

 

sorry boosted

just the stock reflash.. but even before i went turbo it did the same thing.. some days it felt better than the others.. and i am talking about mid throttle 2000-4000 rpm range.

 

I've noticed this.. I'm NA - mods are dc headers, crawford hfc, jic y, nismo exhaust, and kjr pulley. No tune yet, but I know im running lean.. Sometimes the car feels great, nice pull to redline, other times it feels sluggish and it doesnt set me back in my seat. I thought it was the temperature, but I ran through the gears at lunch today and it seemed sluggish.. And it wasnt that hot out..