I dont have a test light. only have mulit-meter.
I had a chance to mess with it today.
1. There is good vacuum at the throttle body
2. The solenoid opens and pulls vacuume when accelerating
3. The EGR valve opens when I pull vacuum on it but it doesnt stay open. When i pull vacuum it opens for a split second then closes again.
4. I left the EGR valve off and started the motor, then throttled it a bit. I also sprayed carb cleaner in the EGR holes (hope that wasnt stupid), then started and throttled a bit.......no change when all was reconnected.
Sorry to be a pain. Im at a loss