hamyam

When im warming my impreza up after about a minute it starts hesitating a bit like its misfiring but goes if I rev it then it goes back to running normal again. I am using NGK PFR7B spark plugs at the moment and was wondering if I went back to NGK PFR6B this might cure it?

eski_wrx

hi m8 mine did the same thing.. and it doesnt wana pick up speed nicely? seems like its really struggling. it judders on idle quite a bit as well? just had the exhaust replaced and cat removed (as once the cat-on-fire light came on).. but the problem is still there?

hamyam

mines only doing it for a short period between when the engines cold and hot,