:My questions are many
:1. What can cause this high pressure (takes 520psi to blow that relief valve)?- too much refrigerant
- not enough airflow across the condenser
- too much oil
- blockage in the system (I've seen the dessicant bags rupture inside the receiver drier, which sends garbage throughout the system)
- too much refrigerant (low side will always look too low if TSV is still installed)
:2. Is there something between E12 and low pressure switch? no
:3. Can the ecu still be a problem even tho its sending a proper trigger to activate AC based on AC request from climate control. depends. ECU can fail such that the compressor is ALWAYS engaged (transistor fails closed rather than open)
:4. Could the suction throttle valve be the problem? How can I diagnose this? Z32 wiki saids to check coils on evaperator but the car was blowing cold. TSV could be stuck closed or clogged. this can be diagnosed with a set of gauges, and would show as abnormally hi on the hi side and a vacuum on the low side.
:
:thanks in advance
:signed
:Sweating in the summer.
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