Ok, its been a while since I've been on here, but I seem to have a problem with the Powermaster, and not sure if this is a simple fix or a rebuild is required. I would like to keep the Powermaster system and not convert to vacuum setup.
The Good:
The Good:
- I replaced the accumulator ball 2 years ago (unit from Highway Stars). Can't remember what the issue was 2 years ago on why I replaced it, but I believe it was because the pump motor was running too long for each cycle.
- I replaced the pressure switch today (new AC Delco unit)
- No brake lights come on, and the brake pedal feel is normal at all times of operations.
- No outer leaks visible with the unit.
- Brake fluid levels are correct on both sides of the reservoir.
- I did the key turned on (accessories on) diagnosis and sat in the car for over 40 minutes and the motor/pump did not kick on, which I believe is the test to make sure the check valve (underneath the accumulator ball) is OK and working correctly. I believe if its a bad check valve, the motor/pump would randomly kick on while the key is in accessory mode.
- On exactly EVERY third time that I press the brake pedal (whether I'm driving, idling, car off w/key turned on), the motor/pump would kick on for 5-7 seconds. I don't ever recall noticing this issue in the past. Is this supposed to be normal??
- There were a few times this month that the motor/pump kicked on after pressing on the brake pedal and it STAYED running for over 45 seconds straight, I got scared that I would burn out the motor/pump so I had to shut the car off. If this happened while I was driving with the windows down, I might not notice it and then I would really be in trouble if the motor/pump burns out.
- Powermaster is 100% original (with the exception of the 2-yr old accumulator ball and new pressure switch). Car was sitting for an extended period of time, and I should've de-pressurized (i.e. pumped down) the unit before I let the car sit for so long.
