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Diagnosing The GM TPI
Our project Fire-Turd has run well and never really skipped a beat (we constantly cross our fingers!). Through the use of modern technology, the Diacom identified several codes and helped us eliminate all but one. This could be caused by a marginally failing device, or a fault somewhere in the wiring harness itself. At this point you should consult a factory service manual, which contains step-by-step diagnostics for isolating the fault causing the code. Usually all that’s required is a multimeter, test light, and jumper wires. In our particular case, Myron believes it’s just a bad connection somewhere, and told us to replace the Burn off and MAF Power relays first, then to look into replacing the Mass Air Flow sensor. After all, spending $20 on a couple of sensors is a lot cheaper than handing over $300 for a new meter! We’ll keep playing with the ground and change the relays, but the car runs fine and idles great, and the fan works, so we’re ready to head back over to the nitrous refill station. View Related Article
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