Re: Vacuum range for 245 Six

Posted by Owen_Dyneto On 2021/1/22 21:19:46
Your engine in healthy condition and in good tune should give 18-20 inches of vacuum at idle. Very small changes in ignition timing and/or idle mixture could easily account for the slightly lower value you're seeing. Assuming you've checked for a small vacuum leak.

Slight fluctuations (a half inch of vacuum or less) doesn't represent anything to necessarily be concerned about as long as the engine is performing well, good even compression, etc.

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