I made the swap from H23 to H22 (see other threads) and went to set the idle speed by turning the screw (jumped the service connector) and there was no noticeable difference in the RPM. I turned the screw in and out about 2 full turns. Any comments when this adjustment is made? I'm surprised. I must have some other things going on. I was looking at my sensors and I'm thinking that there was no MAP sensor on the H23 (the vacuum hose is plugged), but the H22 may be looking for one. My manual shows all the same sensors for both the H23 and H22 but clearly there was not one on my firewall. Is there a list of sensors that the H22 absolutely needs?