I have a 94 legacy GT Twin Turbo, I have had a few problems since importing it from Japan for which I have had fixed, but when I floor it and the revs get up to 5000 RPM the engine starts to miss much like a slipping feeling (power surging very badly)
The engine runs great around town and fine on the open road with normal driving speed (speed limit) I get about 350km to a tank
I have replaced the knock sensor and have had the air flow sensor rebuilt. after fault codes indicating.
The spark plugs are brand new.
I did notice the blow off valve blowing air out in idle 750rpm, is this normal?.
If the coils are damaged could I expect this symptom.
If anybody could lead me in the right direction I would be very thankfull.