The outside temp was about 70 deg F, and I was cruising around town and not really revving the engine high. As far as the filling of R134A, when I brought it in for filling last August, I belive the mechanic used the number from the owner's manual, as I did not know how much refrigerant to tell him. However, the manual must indicate the amount of R-12 to use, instead of R134A. Perhaps this is a problem for me. Paul --- In dmcnews@xxxxxxxxxxxxxxx, "Tom" <tomciodmc@...> wrote: > > Hi > The symptoms you're describing can either mean that your A/C is perfectly fine or that you have a small leak. It depends on the outside temperature. The colder it is the shorter the compressor will stay on and the hotter it is the longer it will stay on. It also depends on the engine rpm. A short cycle as you described at idle would mean it's ok as long as the outside temperature was around 60 degrees F. If the temperature was higher than that it probably means you have lost some of the refrigerant over the winter which is to be expected with R-134a refrigerant and old R-12 hoses. The reason for that is because of the molecule size difference between the refrigerants. R-134a molecules are smaller than R-12 ones. For that reason converted systems often leak slowly because the gas escapes right through the rubber hoses. The really proper way to do a conversion to R-134a is to replace all rubber hoses and use barrier hoses designed for R-134a. Or.... You can keep refilling the system every spring. Just keep in mind that the proper and only accurate way to measure the amount of refrigerant in the system is to evacuate it completely and then refill it with the proper amount of R-134a - for a DeLorean it should be about 2.0 - 2.2 lbs. of R- 134a. > Hope this helps > Good luck > > Tom Niemczewski (on vacation) > Vin 6149 > > -----Original Message----- > > However, the constant > >cycling of the cooling fans worries me. The fans will stay on for only > >two seconds, and off for about 5 seconds, on and off on and off. > >Wouldn't this cause excessive wear on the fans to energize them every 5 > >seconds, and they only stay on for 2 seconds? It doesn't seem right. > >The cycle tiem seemed to be longer last year when I had it charged in > >August. I have the R134 conversion. > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/