I posted back last year about an issue I am having with my Durgano with a rough idle at stops. I see the RPM's drop and then surge back up. I replaced the IAC valve to see if that corrected the issue and it hasn't. So my next idea is the EGR valve, PCV valve, and front 02 sensor.

Does this engine have both the EGR and the PCV or is there only one? I don't have manual on this engine so I am not sure. I see another device directly under the IAC valve I replaced last year. Is that the EGR or something else?

Any helpful pics or diagrams appreciated.

 

Is the check engine light on? If it is, what are the codes.

 

No check engine light on. I wish it was as it might tell me where to really look. I did have it in the shop for a gas tank issue a few months back and they found a few other codes and fixed some things but this one has never shown a code. So I am left at guessing what might be wrong.

So far I replaced:

IAC valve - few months ago
TPS - Just did this today. Jury is still out on if it's resolved the issue or not.

What's next? I guess I could clean the throttle body but again, I'm not sure on that as to what I would need to do.

Annoying as hell and if I took it in to the shop it would be there for a day or two I bet and I don't have that much time to leave this there as I use it for work. At least I can sort of live with the rough idle for now while I figure it out.