Rapid cycling is a symptom low refrigerant level. Compressor should turn on when the low side is at ~40psi and run until it reaches ~20psi.
When you add R134a, place the can in a pan of warm water, keep the can right-side-up (so you introduce gas, not liquid). Add a little bit at a time and let the system stabilize, until the compressor cycles normally. Be sure not to overcharge - the performance of R134a systems seriously degrades when there is too much refrigerant.
AL
Red '98 SVT E0 3098/6535
KKM, Elizabethan EGR Plate, TH fix
OMP front brace
Hightower rear brace
DMD
B&M with reverse lockout disabled and centering spring removed
Mobil 1 oil and trans fluid
A6 Side Markers, Optima orange, Horn recontent
Painted Sail Panels
VooDoo Knob and pedals, RogerR deadpedal
Blau Houston & CD changer
Cup holders that work
Donnelly mirror
BAT Sill Plates
and a Bullitt fuel door
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