Peytons'z

I did a quick search and found a few people with apparently the same problem, however no one had a definite solution. I have replaced the wire and the plug but it is still arcing, only at idle though. It appears to be comming from the end of the boot.

One thread mentioned removing the metal boot protector and installing Taylor fire sleeves. They are not that expensive so I might try this soon. Any other ideas?

firetird

what kind of wires are they? i had the same problem with every set of Taylors that i had so i switched to Accel 9000's and that fixed the problem. But i would also remove the metal boot and replace it with some fire sleeve of some sort.

moparman

Make sure the boot is securely snapped onto the plug.

Peytons'z

Thanks for the responses, they are autolite professional wires. I'm not sure how it could be the wires though. No other cylinder is doing this, just #7. The wires were installed about a year ago and I replaced #7 wire a week or two ago. The boot is as far as it will go onto the plug.

1racerdude

It is a glow or halo that can't be stopped. Do a search in plug manufacturers sites and ya can read about it.

Peytons'z

It's definitely an arc, not just a glow or halo.

1racerdude

The plug gap is too wide(I say this all the time) Use .035 gap. There is something on the porcelain causing the fire to tract to ground(metal part of plug). The spark will take the path of least resistance.
Is the car missing?

Peytons'z

Well I went to check it again and it's not doing it now . Maybe because the car was not warmed up this time. It doesn't miss or anything that I can tell however some days it does seem to run better than others. I'll recheck the gap tommorow though. Thanks for the help.

1racerdude

respectirocz

try keeping the #7 wire away from the #5 wire, this used to be a problem on older smallblocks
when #5 is finished firing, its spark plug can have a path of lesser resistance than the #7 spark plug and since the wires run together its possible for #7 to misfire