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90 grand prix tste not boosting


SVOSTE90

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hey guys,

 

not very familiar with the 3.1 turbo setup, but i acquired this car 2 years ago and just had a chance to start tinkering. new battery started her up. ran fine and pulled hard with partial throttle, turbo seemed to boost. got back home and checked fuses and accidently put one of the ignition fuses in a blank spot. ran down the road again, car ran sick. rechecked my fuse tampering and plugged the fuse back in. she leveled off and ran fine, but under boost it backs up at any positive boost on the gauge and tranny won`t shift until i let up. keep in mind when the fuse was out the car ran sick and sparks shot out of exhaust when reving up at idle before fuse correction. maybe i should reset the ecm? seems that boost control not working or something in that line. thanks for any tips. would like to get this 1990 turbo ste/red running like new again.

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