CIS FREQUENCY VALVE REPLACEMENT

I changed out the CIS frequency valve in my 1984 Saab 900 Turbo today. I was nervous about it because of the age of the shrink tubing on the barb end of the valve. It went okay. I unplugged it and I did not have to remove any surrounding devices. There is a metal collar on the end of the shrink tubing that also need not be removed before heating it up. I used a hair dryer. The valve came off easily. The metal collar is removable, and I was careful to save and replace it when attaching the new valve. After a couple of metric wrenches easily removed the upper connection of the valve.The only tricky part of the installation for the new valve was the factthat the rubber mount had broken off. I removed it from the old valve andput it on the new one. Then I drilled holes in the sides of the rubber mount so that I could remount the new valve with a piece of electrical wirearound it. I reheated the shrink tubing and the new valve went in easily,then I reattached the upper mount with the metric wrenches. My make shift wire mount went into the original mounting holes and I bent the wire to hold the valve. There was still the finicky CO adjust to be done, but after the new CIS Frequency valve was in place I noticed a substantial increase in torque because the CO mixture was being regulated more closely to the way it was intended.