1977 Mercury Marquis 351-m

1 posts 1 contributors 945 views

Member since Apr 2004
2 posts
cleveland, OH, USA

Apr 9, 2004 at 6:15 AM

No matter how i set the timing on this engine why does it have pre ignition knock?The only thing that seems to help is putting premium fuel in it and at current prices it's killing me.

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