Hi All,

Just a newbie question i guess.

I am freaking out and need some advice from you guys.

I have a Gc8 with an EJ20K STI motor that has 480cc yellow tops.

I've just installed a TD05-18G and the car runs like absolute crap. Misfiring and very rough.. I've barely driven it staying under 3k rpm, hover at 2k rpm. few back fires here and there.

I am using the powerfc, i haven't had a tune yet. (just the base map that comes with the pfc)

Is this normal? and will the tune fix this?? (ill get the car towed for the tune)

Thanks all