OK, maybe the grey ones...
For the past week I've trying to sort out a problem with my air suspension.
I'd refurbished a spare valve block with new Orings and a diaphragm valve and then did a changeover with the original valve block. After the changeover, I encountered problems. The main problem was that the back would go up and down but the front would only go up - and up and up until the shocks topped out.
I've had the valve block and compressor in and out of the car so many times in the past week that I know it intimately. My wife suggested I buy a new valve block (at over $1500)!
I've changed the electronics, I've swapped solenoids, I've swapped valves, all to no avail.
Today I removed the new $80+ diaphragm valve and refitted the old valve.
That cured it. The new part is duff! Gaaaahhhhhh!!!!!!
Tonight I'll drive the car for the first time in over a week.

