Hey all, Spec is: E36 318is 1998 Shell 1992 Non Vanos M50 325i engine Standard exhaust with de-cat Standard air filter 318is diff. When I first swapped the engine over to the M50 it was sound, pulled like a train and never had to kick the sh*t out of the clutch, but recently its lacking loads of power, wont spin up with out hammering the clutch, even in the soaking wet when changing from 1st to 2nd fast.... Sometimes (getting more and more frequent) it splutters like crazy, to the point when I nearly come to a standstill, a few pops from the exhaust. It goes once I stamp the throttle a few times and then it picks up Ok.. Anyone any Ideas, I've had it on a Snap on Versus pro and it just threw up O2 sensor (Which it would with the de-cat would it not?) and AFM faults, but not sure the AFM would cause problems this bad? Cheers all.