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Compressor clutch cycling too much?

2ndgenteg on Sat August 16, 2008 10:43 PM User is offline

Year: 1993
Make: Acura
Model: Integra
Engine Size: 1.8
Refrigerant Type: R134
Ambient Temp: 90 F.
Pressure Low: 24
Pressure High: 200
Country of Origin: United States

I just finished my R12 to R134a conversion using the Evac/Charging procedures on this site. I started with 60% of original R12 capacity and added 1oz. at a time until I got the lowest vent temperature. I stopped at 76% of the total 34oz. R12 capacity. I'm getting 41 deg. F. at the center vent on low fan speed. The pressures posted above is at 1200 rpm. I have several questions: At what eng. rpm am I to take pressure readings, idle or fast idle?
At higher eng. speed, approx. 2500 rpm the pressure goes to 15 psi (low) and 220 psi (high). Also, the compressor clutch is cycling about every 15-20 seconds. Is this normal? The vent temp. never goes above 45 deg. so I'm happy with that.
Should I be concerned about burning out the clutch?
Does excessive clutch cycling mean I need to add more R134a?

Thanks in advance for any input.

Mattb on Sun August 17, 2008 12:35 AM User is offline

You may be a little low on refrigerant. As recommended in other posts, I would check vent temps and pressures around 1500 rpm with the A/C set to MAX (recirculate) with the fan on the highest setting - not the lowest.

TRB on Sun August 17, 2008 2:01 AM User is offlineView users profile

Need those pressures at 1500 RPM! Quick cycling could be a low or high pressure issue.


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