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The mkiv Supra Owners Club

Comm port not working on diagnostics


SupraRider

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Hi peeps, I own a j-spec N/A 93' auto. Car's been playing up recently, felt jerking motion whilst driving, car's losing power, suspect engine misfire, took it to a garage to run a diagnosis, told me he couldn't do anything as the comm port is not giving any information to his system, went with the manual bypass, that didn't work either. He has no wiring diagrams for my car as its an import.

 

told him that Mr. T removed a piggyback ECU for this car in Jan because it was causing major faults even causing the car to breakdown.

 

told me to check back at Mr. T to find out if there's a wiring problem after removing piggyback ECU.

 

what could be wrong?

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