dbrannon79
I'm getting there!
Hey guys, some recent reading and things I am seeing has gotten me to ask some questions on my AC system. as I had posted in another thread, installing a cooling upgrade on my 95 pickem up truck, I am now able to see just how much just how much my ac compressor is cycling while on the road (light in the dash tied into ac and fan controller) I think it's cycling way too much.
it's cooling decent so I'm not complaining in that department, but with my gauge manifold pressures looking like it's low on freon (134a) (pressures afound 27low 200high) and how much I have charged it with. I am afraid to add anymore and end up breaking something. while on the road it's constantly cycling and I'm afraid it's gonna eventually cause clutch failure. now with the fan clutch engaged I can also constantly feel the compressor cycling through the truck too.
I have been reading and thinking about evacuating it and installing a variable orifice tube. It's already been recommended for me to use the higher temp vov for my area in south Texas. since we are slowly getting into the cooler months of the year, I have some questions and need some opinions..
1. with the 105+ deg rated vov, how well will the AC work when outside temps are in the 80's to 90's?
2. I have heard other talk badly about them as they seem to be kinda like a gamble getting one that works and not DOA out of the box. what are things to look for to determine if the one I get is bad. I know if pressures spike and no cooling it's clogged, but how can I tell when it's working, should I see a consistent pressure regardless of engine RPM?
3. probably the most damming situation for me... when I last had toe front grille off the truck, I realized that someone before me had installed one of those orifice tube repair kits on the condenser. will these vov valves fit inside of one of these "holders" since I think they are slightly longer than a fixed orifice tube. (current one installed is black in color)
to touch on what I have done to the AC system... all components are new (installed a kit from AAP about a year ago) New compressor, accumulator, black orifice (came with kit) Flushed, pulled vacuum and charged. when I charged it I followed spec that I believe I found here in the forums somewhere, but since have added about 1/2 to 3/4 of a 12 oz can more of 134a.
the reason I replaced everything was (me being the dumb one) had a working ac but it wasn't cooling worth a darn. I had done propane conversions on some of my previous vehicles in the past with great success using enviro-safe freon, so I tried it on this truck. it worked dam good for about a day until the compressor grenaded. I couldn't find a cycle switch that would allow lower pressure to cycle due to the odd ball threads on the accumulator so me the dummy bypassed the cycle switch. wrong move on my part, but that's history, live and learn lol... when I installed everything new I went back to the factory 134a.
it's cooling decent so I'm not complaining in that department, but with my gauge manifold pressures looking like it's low on freon (134a) (pressures afound 27low 200high) and how much I have charged it with. I am afraid to add anymore and end up breaking something. while on the road it's constantly cycling and I'm afraid it's gonna eventually cause clutch failure. now with the fan clutch engaged I can also constantly feel the compressor cycling through the truck too.
I have been reading and thinking about evacuating it and installing a variable orifice tube. It's already been recommended for me to use the higher temp vov for my area in south Texas. since we are slowly getting into the cooler months of the year, I have some questions and need some opinions..
1. with the 105+ deg rated vov, how well will the AC work when outside temps are in the 80's to 90's?
2. I have heard other talk badly about them as they seem to be kinda like a gamble getting one that works and not DOA out of the box. what are things to look for to determine if the one I get is bad. I know if pressures spike and no cooling it's clogged, but how can I tell when it's working, should I see a consistent pressure regardless of engine RPM?
3. probably the most damming situation for me... when I last had toe front grille off the truck, I realized that someone before me had installed one of those orifice tube repair kits on the condenser. will these vov valves fit inside of one of these "holders" since I think they are slightly longer than a fixed orifice tube. (current one installed is black in color)
to touch on what I have done to the AC system... all components are new (installed a kit from AAP about a year ago) New compressor, accumulator, black orifice (came with kit) Flushed, pulled vacuum and charged. when I charged it I followed spec that I believe I found here in the forums somewhere, but since have added about 1/2 to 3/4 of a 12 oz can more of 134a.
the reason I replaced everything was (me being the dumb one) had a working ac but it wasn't cooling worth a darn. I had done propane conversions on some of my previous vehicles in the past with great success using enviro-safe freon, so I tried it on this truck. it worked dam good for about a day until the compressor grenaded. I couldn't find a cycle switch that would allow lower pressure to cycle due to the odd ball threads on the accumulator so me the dummy bypassed the cycle switch. wrong move on my part, but that's history, live and learn lol... when I installed everything new I went back to the factory 134a.
