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Old 06-17-2013, 11:17 PM   #3
BiggSixx1970
Registered User
 
Join Date: Mar 2012
Location: Lawrence, Kansas
Posts: 78
Re: diagnosing this fuel/spark issue

That's exactly what I'm afraid of, adding another problem to the mix. I have never touched the idle speed and idle mixture control. The vacuum advance on my distributor is new, it came with the new distributor

Now I don't know much, but I thought that if the vacuum advance was acting up it would idle correctly, but run rougher or cut out as the rpm's increase?

I will start by trying to track down a vacuum leak, but my engine has almost NO vacuum lines. Theres no power steering, no power brakes, no ac. In fact I think the only vacuum line it has is to my distributor for the advance, and my oil pressure gauge.

If memory serves me correct, when I replaced my distributor last summer, to set my idle timing I set it without my vacuum advance connected, meaning the engine should idle without the advance, just cut out as the rpms increase, right?
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1970 C20, SM465, Eaton Ho52, HD coils, NO PB/PS/AC, 250 I6, Wood bed. All original minus a tune up!

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