The check engine light is on and the code is narrow passage in EGR. Would like step by step for checking valve and removing and cleaning if possible. 1996 A6 Quattro Avant

The problems with the first solution are:
1. Too general, I knew all of that.
2. It is possible to clean an EGR valve as long as the valve is able to hold a vacuum.
There are lots of things to move around before I can get to the two bolts that hold the EGR valve on. This being an Audi, it is complicated and done improperly is going to be a problem. I want the actual step by step. Besides that, it would be good to get an answer from a person that has cleaned the channel in an EGR valve (although I am pretty sure I can get that done once I get the valve carefully out). Also advice on re-install. The problems with the first solution are: 1. Too general, I knew all of that. 2. It is possible to clean an EGR valve as long as the valve is able to hold a vacuum. There are lots of things to move around before I can get to the two bolts that hold the EGR valve on. This being an Audi, it is complicated and done improperly is going to be a problem. I want the actual step by step. Besides that, it would be good to get an answer from a person that has cleaned the channel in an EGR valve (although I am pretty sure I can get that done once I get the valve carefully out). Also advice on re-install.

The idea of covering a hose that runs to the EGR and see if engine stumbles I will try. I am not sure what "xxxx" means. I think that your test is to make sure the vacuum is working in an easier way than getting a vacuum test tool, and so I like it. The problem, if I do have a working vacuum, is still the narrow passages through the EGR and that channel into the engine. I need a step by step for getting to the EGR for your test and then continuing step by step to take out the EGR safely. It would be good to have a specific for the type of vaccum hose I should get if I need to replace it. Either way, I think I will replace that hose. What works for hose there?

I do not want to start this fix until I have the step by step. This is a new car to me and, from what I understand, there are lots of ways to wreck an Audi system by uninformed work. If you know the step by step to get me through the process, as I asked in my question, send it along. If not, let me know so I can ask another. Still, thanks for the vacuum test idea. Have you actually tested an EGR this way?

thanks,

Chris The idea of covering a hose that runs to the EGR and see if engine stumbles I will try. I am not sure what "xxxx" means. I think that your test is to make sure the vacuum is working in an easier way than getting a vacuum test tool, and so I like it. The problem, if I do have a working vacuum, is still the narrow passages through the EGR and that channel into the engine. I need a step by step for getting to the EGR for your test and then continuing step by step to take out the EGR safely. It would be good to have a specific for the type of vaccum hose I should get if I need to replace it. Either way, I think I will replace that hose. What works for hose there?
I do not want to start this fix until I have the step by step. This is a new car to me and, from what I understand, there are lots of ways to wreck an Audi system by uninformed work. If you know the step by step to get me through the process, as I asked in my question, send it along. If not, let me know so I can ask another. Still, thanks for the vacuum test idea. Have you actually tested an EGR this way?
thanks,
Chris