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How do you fix when your truck is running lean or running rich?
Wiki User
∙ 13y ago
If it is an older model there are small screws on the front of the carb to adjust it. Usually if you turn it all the way in clockwise (gently so you don't damage the needle valve) and then back out two and a half turns will get you in the ball park. Also on some older models you can go to a hotter plug. On newer models mixture is controlled by the computer by getting inputs from the oxygen sensors in the exhaust manifolds or from both sides of the catalytic convertor and adjustment at home is not possible.
Wiki User
∙ 13y ago
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We need to know the year, make and engine to help you.
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