Quote:
Originally Posted by raycow
Hook up your timing light and let the engine idle. You want to see how much the timing changes when you connect and disconnect the vacuum hose. If there is no change, check to make sure you are actually getting vacuum. As a test, you can put the end of the hose in your mouth and suck on it - hard.
Ray
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I drove on the freeway with the vacuum disconnected, and there was no noticeable difference in timing, still pinging while acc. on the freeway.
I will check for vacuum by your sucking method! Is perhaps the vacuum hose connected to the wrong side on my carburetor? It's on the left side of my Edelbrock performer.