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Old 08-30-2012, 02:38 PM
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I am not sure about the gap but 35 is where I used to keep mine. Oil can cause detonation too. I would try just changing the gas first. Do not forget there is also winter and summer formulas. So if you do not drive the car a lot you could have the wrong season gas in it. Also with the ethanol in gas it goes bad fast. If you don't drive it a lot put some stabilizer in it. Or what I did was used some 100 octane plane fuel. I know it is not totally recommended but if you do not drive the car a lot the plane fuel does not go bad. Drive that car letting it wit will kill it. At least get it up to temp once a month to get the contaminants out of the engine. Don't mess with the timing until you try the simple stuff first.
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