- Sep 11, 2006
- San Jacinto, CA
This is the deal 307 chevy stock distrib (not HEI) with a one way valve on the vacume line. I have been trying to figure out why it sputters when giving a little throttle to it mostly happens in 2nd and third gear. I have played with the timing a bit rebuilt the carb (EDL) but still it happens. Sunday decided to pull the one way valve off and run the vacume line direct to the distrib... big diffrence it acted like it was running on four cylinders ran real rough. My question is, is this valve needed and if so what is it's purpose? Im not sure if it is keeping the distrib from advancing as it should. This weekend I will probably pull the valve and re-time again to see if it helps. Just wondering!