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I'm having problems with my 85 GN not shifting into overdrive. I've taken the car back to the shop for adjustments but then it idled high. I then adjusted the throttle position sensor but the shifting problem reocurred. I had the engine and transmission rebuilt last summer by a pro shops but installed by a shop who later stated they never worked on turbo engine.
My engine idles high low even after changing the idle arm sensor. Any suggestions. Also does anyone know of any shops in Michigan or near that work on 84/85 GN's. The dealership is cluesless. Are there any books out there for troubleshooting. Thank you in advise. Bryan
 
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