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Old 10-22-2001, 03:04 PM
Robert Boyer
Posts: n/a
loose spark plug wire boot

I had been getting some smoke and slight vibration, so I checked my wires. (They were replaced with OEM about 5 months ago).

Lo and behold, the 3rd wire from front on driver's side (420 SEL) was loose at boot. Upon removal, I found that in addition to being loose, white powder gunk had clogged the boot and the inner recepticle preventing it from properly inserting all the way.

After I cleaned it out and plugged it all the way in, car seems to run stronger with less vibration.
Also, smoke appears to have disappeared.

Does all this seem logical?
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Old 10-22-2001, 05:41 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 18,745
Perfectly logical. With a poor electrical path from the distributor to the spark plug, you weren't getting complete combustion in the #7 cylinder. The smoke you noted was unburned gasoline.

There can be other reasons, but if your car runs as you feel it should, give yourself a big pat on the back for a job well done.

91 300SE
81 300SD
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