hey there

ive got a EF with an AU motor , running on brand new lead, plugs , and EL intake TB to lid ,brand new radiator , and some kind of cheap after market converter brand named lovato, some kind of "home made balance pipe ?" came with the car not sure and a brand new "wreckers spec" oxygen sensor bosh

now the car just keeps on surging etc when ever it gets over about 3K and just feels really sluggish its as if its running way to "lean" or rich ive tried adjusting the sensitivity but it only helps for a few moments

also i have found it strange that i can disconnect the stepper motor and the car will still idle the same , haven't tried driving with it disconnected though

anyone please pretty please