Quote:
Originally Posted by upon1
I’m doing a 2003 5.3 in a 55 and am loosing throttle response. If I rev it up sometimes it will die and the engine light comes on with code 1518 (TAC Module). After it’s restarted there is no pedal response. It idles fine. Also if I clear the code and hold the pedal down suddenly it will rev up then just go back to idle even with the pedal to the floor. If I slowly accelerete it will rev a lot higher. Kinda stumped.
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Like ls1nova71 mentioned, it could be mismatched components (or a defective component). Also, double check that the TAC module is getting power at the same time as the PCM. If one is powered up before the other (or one doesn't get power in the ignition "crank" position) you'll get the P01518 code.