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95K, I read on another forum about using a fuel injection additive to clean out the injectors. However, I've never tried this. I also read about the OBD 2 code readers which read the codes from the vehicles computer. Any suggestions?

95K, I read on another forum about using a fuel injection additive to clean out the injectors. However, I've never tried this. Any suggestions?

I have a 2002 Tahoe LT with the 5.3. At low speeds the idle nearly bottoms out with the A/C on. Even with the A/C off the idle is about 500 or lower. I've changed plugs, wires, fuel filter, PCV and cleaned off my K&N filter. No change. Now out of warranty and almost out of money. Does anyone...