[riesman20]

I have a plug wire that is arcing on my exhaust manifold? It is an HEI setup in a sbc. Causes?

[Jmark]

Got too close and crispy, damaged the outer wrap of the wire and is now arcing. Replace it and keep it a little farther away from hot stuff!

Mark

[riesman20]

Mark, I don't really have any room on the passenger side of my engine and 3 of the wires are resting on the manifold, with no slack to take them further. I don't remember them being that tight when I took them off. Also does misfiring really mess up timing, as I had to set the initial timing at about 14 to get it to run right and factory setting calls for 4 BTDC at idle?

[60convert]

the problem with arcing is that the plu isn't firing all the spark is going to take the easyest route to ground wich now is the exaust . replace all the wires and make sure they are stay away from exausr and moving parts. also if its been a while replace the cap and rotorand the plugs. what kinda engine is it whats been done to it and whats it in that will help to distinguishe what your timing should be. also check to make sure the mechanical advance inside the cap is working.
Jesse

[71 c-10]

i'll take a picture and show you how my wire are set up to keep em away from header heat... once i find the camera... wasnt to expensive either... i'll post the pic later this afternoon.