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    1987 GMC R2500 V.S. Parts Cannon

    I own a 1987 GMC R2500 with a 350 TBI and finally got it running but will not have any power past half throttle, My suspicion is that the ECM is stuck in limp mode but I have no idea. Everything I replaced- MAP Sensor, O2 Sensor, Temp Sensor, Throttle Position sensor, EGR, Distributor, Fuel...
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