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Code 42: EST goes open
Posted to Technical Discussion Forum on 11/21/1998 17 Replies

Code 42: EST goes open

HEI EST
88 Camaro 2.8L MFI

Ok, from here we take a look at what happens when the EST wire goes open. The ICM toggles between bypass and EST mode with the 5v bypass line. The circuitry in the ICM... Login to read more.

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