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ironicly.... this si exactly what im having trouble with. im a tech and do work on the side on jdm cars etc. my buddy brings me this originally for an exhaust leak.... horribly.... so i get it all down to find manifold to turbo gasket is blown. it scheduelde for rebuild block right away here anyway so no biggy.
but anyway i get it all back together and he get half way home and he gets same thing around 3-4 grand after driving for couple minutes no trottle response engine misfires and sputters horribly. then if he manages to bring his rpm up and boost goes past 0 it will run ok until you let off. trhen it sputters and wants to be a bitch again.
i searched and went throught what i touched and moved and even unded the downpipe repair i did. maid no difference. upon further searching found the O2 sensor wiring was broken. so managed to salvage the wiring and repair it. ran better than before for first five minutes again then started running like shit and smelt like burning and clearly something has started leaking since it's smoking from the engine bay now. but it baffled me from where. also he gets an engine code that comes on and off but never locks in. which pisses me right off. but i have a feeling its a misfire, or 02 sensor code.
but ive been thinking and only things i can figure that would cause this would be 1. a faulty coolant temp sensor, they always cause wierd issues like this... on off CEL etc. 2. bad ECM something is not right with it anymore. 3. fouled plugs 4. bad O2 sensor reading happeneing from sensor or bad wire.
i will keep trying to diagnose tomorow. and see what i can find
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