How do I test to see if my pressure sensor when bad i have 76 914 and i want to get it off the jack on the road I have put to much time i to this car and money to let it sit in my shop need help badthanks jim
Full Version: need so help
How do I test to see if my pressure sensor when bad i have 76 914 and i want to get it off the jack on the road I have put to much time i to this car and money to let it sit in my shop need help badthanks jim
I can't help you with that but Welcome anyway. 
Welcome to the Bbs Jim,
Here's a way to test your MPS... quite simple too:
Courtesy of Geoff (Bleyseng)
Take a standard vacuum auto pump and attach the hose to the MPS. Pump the vacuum up to 15hg on the gauge and if the MPS holds the 15hg for say 5 min or so without much leakdown (2-4lbs) then the diaphram is good.
The diaphram could be good but other reasons the MPS leaks are:
1. The case halfs o ring is bad
2. The paper gasket that the diaphram seats to is bad.
3. Someone has adjusted the MPS out too far so the mix screws are leaking. (rare)
good luck & post some pics of the car
..........b
Here's a way to test your MPS... quite simple too:
Courtesy of Geoff (Bleyseng)
Take a standard vacuum auto pump and attach the hose to the MPS. Pump the vacuum up to 15hg on the gauge and if the MPS holds the 15hg for say 5 min or so without much leakdown (2-4lbs) then the diaphram is good.
The diaphram could be good but other reasons the MPS leaks are:
1. The case halfs o ring is bad
2. The paper gasket that the diaphram seats to is bad.
3. Someone has adjusted the MPS out too far so the mix screws are leaking. (rare)
good luck & post some pics of the car
..........b
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