car has been running fine for months...ive got an 06 evo9 with a 35r kit..i runs alright but whenever i start hitting boost the car will lean out and begin bucking. I can still drive the car, even though i'd rather not, as long as i stay out of boost.

-Last start up the car was staying at 10.0 fuel and I could just smell the richness of the fuel. any ideas?? checked fuel pressure regulator hose and looked fine.

 

ask mellon since hes ur tuner

 

he said he figured it was the spark plugs..im going to take a look at that tmrw morning

 

any other ideas?

 

mine was like that till we found out mac was disconnected

 

I took Greg's call while he was at the store getting the plugs, they didn't have the stage colder we wanted but at least these will be new ones and gapped properly. Based on what Greg told me yesterday it sounds like it's misfiring, that would explain the false lean condition and sputtering. If this doesn't resolve the issue it probably has a fuel pressure problem...bad pump, regulator, injector etc.