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Pinging 240 200 1986

posted by  Bama740 on  Sat Oct 9 13:56 CST 2004
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last visit: Thu Dec 9 06:07 CST 2010
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My wife's 245 was having a problem with ping even on 93 octane. So I checked the timing. According Bentley the timing should be at 12 deg +/- 2 degrees btdc. It timed at 14. So I backed it off to 12. Now it does not ping IF I burn premium otherwise it still pings some but not as much. Even worse the car has become very cold natured since I re-timed it. My plugs are the recommended heat range. The motor has 300k miles but does not use enough oil between oil changes to need top off oil. I fear a build up of carbon in the combustion chamber but I am hoping someone might have other easier to fix ideas.

Thanks in advance.
--
1988 740 Turbo 220k, 1986 245 300k, Gone: 1962 122-wish I had that one back.






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