EVR testing
Thread Starter
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Junior User
Joined: Dec 2006
Posts: 80
Likes: 0
From: Richmond
EVR testing
Hi all,
Working on my 1992, F150, Auto, 2WD, 5.0 L trying to fix my EGR/vacuum problem. Testing back through the system...EVP is new and good on all fronts. Vacuum line between EVR and EGR is good as well.
Working on the EVR now. I have hooked up a vacuum pump to the inlet (manifold vacuum supply inlet port) and a vacuum gauge to the EVR outlet. I cannot draw any vacuum on the inlet and obviously get none on the outlet side. If I hold my finger over the outlet side, I can hear the valve making noise (kinda like passing gas noise). I have checked my resistance to the EVR and it is 33 ohms.
Am I doing this correctly? From what I have done, does that indicate the valve is bad?
What other tests, including how to do them, can be performed?
As always, thanks and any and all help is greatly appreciated.
Rick
Working on my 1992, F150, Auto, 2WD, 5.0 L trying to fix my EGR/vacuum problem. Testing back through the system...EVP is new and good on all fronts. Vacuum line between EVR and EGR is good as well.
Working on the EVR now. I have hooked up a vacuum pump to the inlet (manifold vacuum supply inlet port) and a vacuum gauge to the EVR outlet. I cannot draw any vacuum on the inlet and obviously get none on the outlet side. If I hold my finger over the outlet side, I can hear the valve making noise (kinda like passing gas noise). I have checked my resistance to the EVR and it is 33 ohms.
Am I doing this correctly? From what I have done, does that indicate the valve is bad?
What other tests, including how to do them, can be performed?
As always, thanks and any and all help is greatly appreciated.
Rick
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
Working on the EVR now. I have hooked up a vacuum pump to the inlet (manifold vacuum supply inlet port) and a vacuum gauge to the EVR outlet. I cannot draw any vacuum on the inlet and obviously get none on the outlet side. If I hold my finger over the outlet side, I can hear the valve making noise (kinda like passing gas noise). I have checked my resistance to the EVR and it is 33 ohms.
Am I doing this correctly? From what I have done, does that indicate the valve is bad?
Am I doing this correctly? From what I have done, does that indicate the valve is bad?
Ford Fuel Injection EGR Vacuum Regulator (EVR)
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Senior User
Joined: Mar 2009
Posts: 294
Likes: 0
From: metro detroit area...
check the resevior... looks like a tomato juice can with two vac lines connected to it. I had the egr code on my 5.8 and turned out the vac res was rusted out on the bottom, replaced it and all is good
Lead Driver
Joined: Nov 2002
Posts: 9,555
Likes: 40
From: Concord, NC
When the PCM Computer is not telling the EGR valve to open the EVR is in the exhaust mode letting air into the EGR valve so it can close or stay closed. When the PCM tells it to open the EGR valve the EVR then sends vacuum to the EGR valve.
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
I don't have any experience testing the EVR, but shouldn't the supply port be closed when the valve is closed? It would be a vacuum leak otherwise, correct? I can understand the outlet of the EVR being vented to close the EGR valve, but purely from a logical standpoint, I would think that the port attached to manifold vacuum would be closed when the EVR is inactive.
Thread Starter
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Junior User
Joined: Dec 2006
Posts: 80
Likes: 0
From: Richmond
"juice" cans are good. Both will hold vacuum...but did notice something today about them and the engine running. Going to post under new thread, called vacuum reservoirs and truck problems.
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