78 450SEL Rough Idle on Plug Carboned!

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78 450SEL Rough Idle on Plug Carboned!

01-24-2001, 08:43 PM

Benzmac

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Join Date: Mar 1999

Location: Suwanee, GA, USA

Posts: 4,712

This is usually the most clear indicator of a worn valve guide or blown off guide seal. I would have it checked, but beware, it could need a very expensive valve job.

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