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Old 03-21-2003, 09:52 PM
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sixto sixto is offline
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 18,745
It could be that the carbon build-up is causing the plug to misfire. If the plug doesn't fire, the timing light won't light.

Have you checked the gap of that plug? Have you tried a new plug in that cylinder?

What's the compression in that cylinder? I'll bet a penny it's higher than the others.

91 300SE
87 300SDL
83 300SD
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