Quote:
Originally posted by ol65cobra
I checked idle mixture screws...I have about 1 1/4 turn out on primary side and about 1 turn out on secondary side.
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Not the mixture screws- the SET screw. The big screw on the base that you set your idle speed with. If you have the throttle plates cranked open too far to make the car idle, that can also cause the conditon that you are experiencing. Try bringing the idle speed down as far as you can without stalling, then with your vacuum gauge re-adjust the idle MIXTURE screws toward the highest reading you can get. This will also raise your idle speed. You want the primary throttle plates barely cracked open. Did you actually check the freeplay in the accel pump arm? Even the slightest amount of freeplay equates to a hesitation. The accelerator pump shot
anticipates acceleration. Similar to a power valve, but think of a power valve as the big on/off switch for the fuel. Put the original p/valve back in. Your problem is not in the acceleration circuit, it is in the transition circuit (idle to part throttle). All of this is only good if you're sure your timing /advance is properly set. I originally suspected your ign. system but from what you wrote I offer this.