Want this question answered?
gauge port
1.5 or 2 inches depending on the multi-port valve that is installed. Hatawa
Connect a freon gauge and tank to the low side ac port of the 97 DeVille. With the engine running and the ac on high, open the freon valve. Shut the valve when the ac gauge reads full.
Try using a strong thin wire inside the hole below the egr and try cleaning the obstructed hole. Your problem is the intake port inside the throttle body. Remove the air intake so you can see into the throttle body and clean out the air intake port to the EGR valve. I replaced everything and finally figured out that the intake was clogged up. Your EGR valve isn't receiving sufficient amount of air, and that isn't anything wrong with the valve itself.
Connect a freon gauge and can to the low side AC port. Start the car and turn the AC on high. Open the freon valve and fill the system to full on the gauge reading.
Connect a Freon gauge and Freon can to the low pressure port. With the vehicle running and the ac on high, open the valve to let Freon in, stopping when the gauge shows full.
The PCV valve is located on the top of the right (passenger side) valve cover. It's connected via a vacuum line to a port on the front of the throttle body.
You can an USB port or LPT port.
Connect a freon gauge and freon can to the low side ac port. Start the engine and turn the ac on high. Open the valve to allow the freon to flow until the gauge reads full.
connect a Freon gauge and Freon tank to the low side ac port. After starting the engine and putting ac on high, open the Freon valve. Watch the gauge until the Freon is full.
The port next to the radiator is the low-side port
connects to throttle body(port C )