Date: Thu, 07 Sep 2000 23:52:32 +0100
From: J <>
Subject: Re: 900 After-running

Ken Washington wrote: > > With all due respects, I did not see your original post, and I happen to > prefer Bosch Platinum plugs myself. The newer +4 plugs are really good. You > might have some carbon build-up that could be causing the after-run. It > might be time to put your car on a scope and check it out. > Agreed. Running-on is caused by carbon deposits in the combustion chambers. The deposits glows after the ignition circuit has been switched switched off, so the spark plugs will have little effect on this. Maybe the engine bores/cylinder rings are well worn such that engine oil can slip through. A compression test could diagnose this. Johannes

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