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subtle_driver

83 l28et runs lean at startup

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My stock l28et runs lean (higher than 16:1 afr) at cold start-up. It should be rich for a little bit. I have to run the engine for a couple min before it goes into closed loop and runs perfect and in specs. The block temp sensor is within specs. What does this fuel management read from and do for the first couple minutes of cold startup? Thanks!

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