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96 GMC 305 engine continues to miss on #1 cylinder. Replaced intake manifold gasket, spider, distributor cap & rotor, Plugs and wires and coil, but it still codes out to 301. I don't know what else to do! HELP!!! Any suggestions would be of great help!! Thanks.

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well if you did the injectors, the intake gasket, plugs, wires, cap and rotor that pretty much takes care of anything up top. hows the compression or a problem with the valve train or springs? coolant leak into the cylinder? Did you hook it up to a scanner and look at the misfire counter to see when it is missing?

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