Quote:
Originally Posted by JD555
When you say backfire do you mean backfire into the intake manifold or an after fire in the exhaust? Backfire is usually caused by a lean condition or a valve stuck or damaged. After fire a rich condition such as lose of spark or overfuel. Weird about the oil only on the treads.
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BF through the exhaust. And it doesn't happen all the time. Like yesterday morning it was just a rough idle, but in the afternoon it kept popping