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Re: 92 CHEV PU C1500 4.3L FAILS NOX
Posted to Emissions Forum on 11/27/2000

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I'm getting a reading of approx 2.2ms at each [...] I spray with carb cleaner the pulse only decreases to approx 1.8 ms.I have verified fuel return line is clear and volume is OK 1pt. in 30 sec. I've ... Login to read more.