So I decided to change my spark plugs for preventative maintenance. After I changed them I test drove my wrx and when I get on it hard at around 1 bar there is very bad hesitation(it is so bad if feels like someone is jumping on the hood of my car). I have tried to gap them multiple times from .035 to .027.
It has been hapening for a while so it isn't bad gas, it happens in cold and hot weather. Also I have data logged and the link doesn't pull any timing and my EGTs are constant, so nothing is out of the ordinary besiedes the horible hesitation. What kind of problems does this sound like? I would appreciate any suggestions you guys have.
UPDATE when I compared my timing and fuel maps from today after driving hard with my original maps I see it pulling and adding timing in various places by quite a few degrees.
BTW I basically have a turbo xs stage 4 kit with a hardwired fuel pump, but I have a link ECU not a UTEC.