Calling all brave ATCII folks! OK, I have my new aluminum servo and my plan is to next weekend install it on my '73 and check all the vacuum lines with the FSM. With a little luck, I hope to at least get the darn thing to come on. After that, I am sure I will need to add refrigerant to the system. I have reviewed all the e-mails in the list archives about the pros and cons to converting to R-134A and have to decided to convert it over to R-134A. One of the e-mails states it is necessary to remove the EPR valve because it is not calibrated to work properly with R-134A and will negatively effect the amount of cooling. The car he was referring to does not have ATCII and has a EPR valve in the back of the compressor which modulates the flow of freon to prevent evaporator core freeze ups. In ATCII cars, the valve used is called a ETR valve, which is electrically controlled by a switch in the core housing. The difference being it is normally fully open or fully closed. My question is: Do I leave it in or take it out and hope the expansion valve will keep the unit from freezing up? Has anyone converted a ATCII car to 134A and if so, what did you do and how did it perform? Thanks, Tim Durrer '73 Blue Sky ____________________________________________________________________________________ Don't get soaked. Take a quick peak at the forecast with the Yahoo! Search weather shortcut. http://tools.search.yahoo.com/shortcuts/#loc_weather ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm