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Re: 84 Cavalier, only runs on two cyls with bypass connected..
Posted to Technical Discussion Forum on 8/31/1998 2 Replies

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Mark, According to my GM TechLine software that ECU #1226458 has had 7 PROMs available for it, with the most recent (2/11/85) being #1227255 ( external ID # are FBT/4131) also it DOES list a CalPak #1... Login to read more.

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