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Re: Low Vacuum? With good compression?
It could be a worn timing chain. You can get an idea by moving the balancer back & forth to see how much movement till it tries to move the cam. About 5 degrees is not bad. 10 or more is too much. How many miles are on it. If it is over 100K it could very well be bad. Those had plastic cam sprockets that wear out easily & the chain can jump a tooth.
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