Hey bolter's. Ive got a really strange issue going on, thats stumping me for the most part. I have a jobmaster 261 i6 engine, and for some reason cylinder 5 has decided it doesnt want to work anymore, ive tried testing about everything i could with the tools i had access too as well as some pm, set points, set valves hot, cab adjusted right. All vac leaks sealed up and fine, new cap & rotor. Plugs and plug wires. Gapped to .035 as the manual says. Doesnt run well unless its 8° advance in base idle timing. But other than that it runs really strong, i have spark, fuel and air, for cylinder 5, it just doesnt light off, ive tried swapping plugs with another cylinder, and swapping plug wires, still no change. Cyl 5 is still dead. Valves are properly set to spec. Could use some wisdom here or things i havent thought of i should try? Thanks .
