Regal V6-191 3.1L VIN M SFI (1995)
The digital EGR valve is opened by the Powertrain Control Module (PCM) Quad-Driver (QDR), grounding each respective solenoid circuit. This
quad-driver activates the solenoid, raises the pintle, and allows exhaust gas flow into the intake manifold. The exhaust gas then moves with the air /
fuel mixture into the combustion chamber. If too much exhaust gas enters, combustion will not occur. For this reason, very little exhaust gas is
allowed to pass through the valve, with virtually none at idle. The EGR valve is usually open under the following conditions:
^
Warm engine operation.
^
Above idle speed.
