Oh, make sure you adjust the screw back to where it should be by measuring the current through the EHA. You cannot just go crazy with that screw everytime you suspect a problem. Always make changes with the EHA current being measured to where you center the current to 0 mA and let the CIS handle the rich lean mixture from there. That current will then fluctuate up and down based on EHA compensation to regulate the fuel distributor.
Again, for the other posters, when it comes to CIS stop playing guessing games. Read up on how it works and what various adjustments you can do and when.