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Classic Car Service
Classic Car Service, Dealership Svc. Mgr.
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Experience:  Over 30 years experience in the automotive field
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Aston Martin DB 7: I have a 2000 aston martin DB7 with the

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I have a 2000 aston martin DB7 with the 12 cylinder engine.It has 15K miles on it.It was having an occasional misfire.My mechanic suggests the the spark plugs and the coils be replaced I think it is because it is not driven enough.What is your opinion?

Toyota Service :

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Toyota Service :

How much is the DB driven per month please?

Toyota Service :

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I drive the DB 7 about a 1k miles a year

Toyota Service :

In my opinion, there is some truth to both lines of thought.

Toyota Service :

First, not driving it enough can create some issues, as the fuel is aging in the tank. Unless you are draining the tank whilst it is not being used for long periods of time, 'old' fuel has a tendancy to not combust properly, which will create carbon deposits on the valve faces, and cause them to not seal properly, thusly allowing the possibility of a misfire.

Toyota Service :

Second, I would guess that the plugs are original, with only 15K miles on it. Infrequent usage does create a carbon buildup on the plugs. If the plugs are original, I would recommend replacing them. I would not recommend replacing the coils, though, unless the mechanic can show you that one or more is weaker than the others, spark-wise (ie an orange spark versus a white-blue spark).

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