Can someone tell me how the waste gate solenoid is supposed to operate. These solenoids appear to be normally closed between the top and side spigots. With the ignition key off there is no voltage present at the solenoid electrical connection, once I turn the key on there is 24 VDC available for the solenoid but it remains closed even with the engine running and vacuum at the top spigot. To me this means that the solenoid is prevented from opening until boost pressure reaches a predetermined level at which point it opens to vent pressure to atmosphere to control the waste gate open/close cycle.
The problem I am having is that I have a CSX calibration, 33 lb. injectors. My boost goes to 20 psi when it should stop at 15 psi because of the cal. Therefore the engine acts like it is going lean and surges. Apparently my waste gate can is opening on its own at twenty psi. I have changed out the solenoid and ohmed it out. 32 ohms resistance. Do these things freeze up?
Can anyone enlighten me?
Jeff