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Finger In the tailpipe. If it's black you might be rich but within O2 sensor parameters. Plugged Cat. Never replaced air filter. Leakey injectors. Go on from there.
My vehicles, on a straight road won't wander off to a side for a good long while. When the front tires are low, my golf tracks the grooves left by truckers tire chains for miles, even around curves.
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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