Is there a correct way to adjust the dashpot solenoid to idle stop screw. The reason I ask is, I will adjust my idle on my carb (Holly 4180) and after a day or so the idle will change. It runs great at 800 RPM, but it will start running at 500 RPM or sometimes at 1200 RPM. I believe it is the dashpot solenoid isn't adjusted right or not working. Any ideas. Thanks.