So I am trying to find out if the EGR system is causing my pinging.

When I pull the vacuum line off the valve I can feel a low amount of pulsating vacuum from the hose. Is this normal?

Also there is no change to the idle when I pull the vacuum hose off the valve. Is that normal?

Is there a way to check if the valve is working?

 

There Is A Way To Test Your Egr Vale And It's Real Easy To Do. Get You One Of Those Hand Vaccum Pumps And Hook It Up To The Egr. Pull 5to6 Inches Of Murcery Of The Egr. If The Egr Is Good Then It Should Hold The Vaccum.the Egr Is Not Supposed To Work At Idle,park,or Nuetral.

 

No. It usually means the EVR solenoid is leaking. Remove the top cap and clean the filter and the top of the valve with compressed air. If that doesn't stop the errant vaccum, replace the solenoid. Pinging is a common symptom of this fault.


Yes. Use a short length of vaccum hose and pretend it's a milkshake if you don't want to purchase or already have a vacuum pump. It has to hold vacuum (diaphragm cannot leak) and when the engine is at idle, should cause the engine to either stumble or stall when the vacuum is applied to the valve. If there is little to no change, the EGR ports are likely clogged. The EGR valve themselves rarely fail.

Steve