But what would a vacuum leak have to do with the opening pressure of the injectors? The car was not running as I was setting the CO screw to see if I can get the injectors to start dripping or spraying. I had to turn it clockwise quite a bit in order to get the injectors to start singing. I can see a vacuum leak being a problem while adjusting the screw while the engine is running on a dwell meter, but not with just the RPM relay jumped. Know what I mean?
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