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Over boost switch
Posted by vvack0matic (more from vvack0matic) on Sat, 28 Apr 2012 19:39:15
How crazy is this,.. years ago I removed and over road the over boost sensor, but left the over boost switch alone, and the car has been boosting excellent so good it was jaw dropping. However just with-in the last few months I heard a distinct hissing coming from under the dash while trying to put the car into boost. Located the hiss to the over boost switch. The vacuum lines are 100% its the switch itself that is now leaking on every boost, every time the car would try to boost past 4psi the switch would bleed off all the boost (it was a very loud hiss)

So pulled the vacuum lines and hard wired the line from the motor to the boost tac. Everything works again. Question is why did the switch take so long to start bleeding off boost. The car in question was boosting 15psi+ and the switch had never opened before, not once. then all of a sudden... what is it blown out?

Being that I probably just leave the switch bypassed for now on, whats up with the 3 wires running to the switch what purpose do they serve?

posted by 67.77.8...
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