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Running rich


monty87
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Went on a camping trip this last weekend and didnt get real good MPH. I have a Air/Fuel meter and it showed one mark into the rich side all the way there.

When I got home I got a new O2 for starters but it pretty much reads the same. Is there an asjustment I can do to lean her out a little?

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That might be a little rich but its mostly your rear differential ratio being higher. You a 3.90? or higher?

I think there 4.86 or something like that, I do have overdrive and RPMS are around 2500 at 70MPH which I thinks ok.

I do notice some black soot around the tip no smoke or anything but you can tell the cat is working over time.

Is there an ajustment I can try? Even under boot its rich and should lean out but not in this case.

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