Aston2jz Posted January 15, 2013 Share Posted January 15, 2013 Just had a NA auto engine fitted in my supra it's drivable but has been running very rough, the car stutters, sounds like misfiring and revs 'pulse' (randomly drops 100 then comes back up quickly). If I try to accelerate it makes a popping kind of noise/feeling randomly and revs go up but no power/speed until the popping goes. Best way I can explain it is the type of stuttering/chugging a car does when its almost empty on fuel lol.. Anyone have any suggestions on what this may likely be? Link to comment Share on other sites More sharing options...
Kaan W Posted January 15, 2013 Share Posted January 15, 2013 Hey, no I dont have a clue but my car has just started doing it Except mine accelerates and pulls fine its just on deceleration I get this pulsing as the revs are dropping. Link to comment Share on other sites More sharing options...
Dnk Posted January 15, 2013 Share Posted January 15, 2013 Take it back to whoever fitted it would be my advice. Link to comment Share on other sites More sharing options...
Konrad Posted January 15, 2013 Share Posted January 15, 2013 ignition coil, spark plugs and fuel filter would be my first checks. Link to comment Share on other sites More sharing options...
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