tick sound at spark plug wire

[91vettezr1]

buyer of my 91 zr-1 is getting a tick on cylinder #2 , seems to be coming from the spark plug area near cam cover. i have not seen it in person just going by what he is telling me. any ideas? he thinks it's a bad wire, wires have 15-20k miles on wires. coils and spark plugs about the same mileage. seems to happen after driving it for over 30 minutes
thanks
todd

[TX '90 ZR1]

Could be spark arcing to ground. Might be as simple as a loose spark plug wire. Pull the wire off and inspect it. Arcing will leave a trail a lot of times.

[Jagdpanzer]

See what it looks like when running the engine in the dark. Any cross arking should be clearly visible


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[WARP TEN]

Originally Posted by Jagdpanzer

See what it looks like when running the engine in the dark. Any cross arcing should be clearly visible


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Ha Ha--good advice and it reminds me of one of my favorite long-ago cars, my '68 Hemi Roadrunner. Back in about 1970 the Hemi at one point was running a little rough and had lost some power. When I was doing some diagnostics I had it running in a somewhat darkened area and the sparks flying from the plug wires to the engine block were quite impressive! Replaced the wires and it ran like a champ. --Bob

[XfireZ51]

Originally Posted by WARP TEN

Ha Ha--good advice and it reminds me of one of my favorite long-ago cars, my '68 Hemi Roadrunner. Back in about 1970 the Hemi at one point was running a little rough and had lost some power. When I was doing some diagnostics I had it running in a somewhat darkened area and the sparks flying from the plug wires to the engine block were quite impressive! Replaced the wires and it ran like a champ. --Bob

Same here Bob. Altho it wasn?t a Hemi.