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Not firing on cylinders 1 and 3??

Discussion in 'XJ Technical Chat' started by Kevin_Peuhkurinen, Mar 25, 2012.

  1. Kevin_Peuhkurinen

    Kevin_Peuhkurinen New Member

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    Hey all... could use some advice. When I put my '82 650 away for the winter it was all running fine. When I took it out last weekend, cylinders 1 and 3 are not firing at all.

    I assumed at first that it was a carb issue so I took the carbs apart and gave them a good cleaning, then adjusted the float levels. Still not firing. Spark tester shows that the plugs are getting juice. Compression tester shows decent compression. Carbtune shows a vacuum.

    It shouldn't be a coil issue since they are on separate coils but I tested the dyna coils anyway and they test fine.

    Anyone have an idea as to what is the likeliest issue? Bad ground (perhaps a mouse chewed through a wire)? Ignition unit? Plugs? Valves?

    Thanks!
     
    Kevin_Peuhkurinen, Mar 25, 2012
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