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rochester quadrajet

  1. Rochester Quadrajet TPS problem

    Modern Electronic Engines
    Hello: Joined this forum because I saw other folks discussing TPS issues on the Quadrajet. The rig I’m working on is an 89 Chevy Caprice with the 305 engine. The code reader is reading 21: TPS voltage to high and 45: rich exhaust (makes sense) I have been consistently reading about 3.39 volts...