What does the boost sensor and DPFE do?

[PARALYZER]

I am still trying to figure out why I get NO boost.

What does that boost sensor that sits in the back driverside at the base of the blower do?

Also, the DPFE solenoid that is on the driverside fuel rail. Its the middle one between the FPS and the boost solenoid. What does that do.

I have the blower off, but I think the problem is electrical not mechanical.

 

[mosconiac]

What does that boost sensor that sits in the back driverside at the base of the blower do?

I believe you are referring to the MAT sensor, which is a Manifold Air Temperature sensor. I might be wrong, but that would be IAT2.

Also, the DPFE solenoid that is on the driverside fuel rail. Its the middle one between the FPS and the boost solenoid. What does that do.

Differential Pressure Feedback EGR (DPFE). So far, all I can tell is it is on there to make my car stumble and miss. LOL. When I unplug it, the car runs smooth, when it is plugged in it stumbles at light loads arounf 1500-2000 rpm. For a serious answer, check out this LINK.