My 91 camaro tbi turned off after one full donut and service light came on but turned right back on like nothing happened why is that???
Donut? Do you mean spinning around in circles smoking the tires or stopped at Crispy Creams and got a sugar fix? There may be a wire that is lose or touching a hot pipe and shorting out when it is subjected to the lateral movement of the car. It could be smog related or ignition related. that is a place to start. A computer module also could have corrosion on the board connections and the movement will cause a light to come on and shut down the motor to protect it. Happy hinting. Also, fuel starvation?
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