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5.0 ford emissions drop in gear!? 87 lincoln mark VII
Posted to Emissions Forum on 11/12/1998 2 Replies

Hello everyone!

This car has a high hc problem, stemming from a missfire, but the curious thing is, when I put it in gear and power brake it, the hc's come down, the co2 goes up, the o2 and co both come down. Why would this only happen in gear and not in neu... Login to read more.

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