About to go from R134 to 12a from Enviro-Safe [Archive] - Toyota MR2 Message Board

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Just got my order of es-refrigerants replacement, what low/high pressure should I be looking for? I have a 1986 MK1 the with R12 runs 20 lowside/200 Highside. The site also states that it runs at a lower pressure, I called and the guy said he had never seen a AC system that ran lower than 30 Lowside. Doesn