I put the 134 oil conversion can in my f150 a while back. The clutch keeps cycling on and off, i can see the pressure in the low side rise to about 45, then the clutch kicks on, the pressure goes down to 25 psi, the clutch turns off, and the cycle repeats. Do i have too much or too little 134 in the system?

 

Never mind, it's late for me, i figured it out.

 

Too little ... keep adding until the compressor stays on.