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Re: 97 Chevy. P/U 4.3 Std. Misfire Code PO300 Fixed
Posted to Technical Discussion Forum on 4/2/2003

You say fuel pressure is ok....

But what exactly is it? some of these are critical to having minimum fuel pressure AND VOLUME. I would also be very suspicious of fuel quality. You say it has 100K on it. How does the fuel filter appear? Look original? Login to read more.