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87 Dodge w150

My truck has 360/4bbl automatic. It idles and revs smooth and quick but when I put it in gear and drive, it shudders and backfires. Vacuum advance issue? New plugs wires cap rotor. I just dont know.

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1 thought on “87 Dodge w150”

  1. First make sure the engine is at operating temperature(180 – 220) and the choke is not closed. Then check your timing. Could be the advance, check your hoses for any vacuum leaks. A back fire would mean spark at the wrong time, so i think you are on the right track.

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