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TexasZR1 · 03-25-2019

Thats exactly what my 1990 zr1 is doing. If i can get it to stay on, it will run solid for abut 10 minutes and you could hang meat in it its so cold. Not sure what mine is charged with though. Wondering if going back r12 (if it by chance has been 'converted' to r134) might be a solution after ruling out leaks.

From my experience with my converted 1991 camaro, the systems are doggy with r134a because the condensor and evap are too small. My 1991 camaro either short cycles or ices over the evaporator core.

Any chance another sensor is resulting in the ac being commanded off? Maybe the freon isnt low, but a high pressure switch, temp switch, low pressure switch, bad ground, poor connection is resulting in the short cycle? Any chance the issue is with the ac control unit? Would love to reprogram it to ignore short cycle cutoff.

03-25-2019	#2
TexasZR1 Join Date: Oct 2018 Location: Houston Texas Posts: 38	Re: AC issue after 134 conversion/repair Thats exactly what my 1990 zr1 is doing. If i can get it to stay on, it will run solid for abut 10 minutes and you could hang meat in it its so cold. Not sure what mine is charged with though. Wondering if going back r12 (if it by chance has been 'converted' to r134) might be a solution after ruling out leaks. From my experience with my converted 1991 camaro, the systems are doggy with r134a because the condensor and evap are too small. My 1991 camaro either short cycles or ices over the evaporator core. Any chance another sensor is resulting in the ac being commanded off? Maybe the freon isnt low, but a high pressure switch, temp switch, low pressure switch, bad ground, poor connection is resulting in the short cycle? Any chance the issue is with the ac control unit? Would love to reprogram it to ignore short cycle cutoff. Last edited by TexasZR1; 03-25-2019 at 10:18 AM.