Q: I have a 1988 mark VII with air supension system, and if someone can help to share his knowlage to provided the psi in the air supentios bladers or air springs system.is there is tool that you can use to mesure them and how much psi ? thanks.
A: Approx. 100-110 psi. to reach normal ride height if you manually fill it through the schrader valve. There is no way to measure the air pressure once it's in the springs/bags. Keep in mind the key must be on and the control module functioning properly when you do so. This assumes your only malfunction is in the compressor. A replacement is available from Arnott Industries. It's a fairly simple system to maintain and repair and provides superior ride and handling compared to hacking it up with coil springs that create a myriad of other problems.
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