Codes 33 and 41 high idle then car shuts off... Help!

[sgw_88FoxGT]

With KOER I get codes 33 (EGR valve opening not detected) and 41 (no HEGO [O2] switching detected always lean right side).

I passed all KOEO and CM tests as well as the cylinder balance test.

My car upon startup right after it's turned on gradually rises to 2000-2500 rpm and holds there. After a minute or two it comes down to 900-1000 rpm and stays there for the rest of the drive. Once in awhile as it's still warming up I get a surge big enough to shut off the car, but as it warms up the surge goes away and everything is fine except for a bit of a high idle.

I tested my EGR valve with a vacuum pump and it's stuck but it also doesn't let any air through so I know that there's no leak there. I used a stethescope to try to see if I had a vacuum leak but I can find one yet so I'm baffled.

Possibly related to this, is the carbon canister supposed to have two caps? Cause mine just has one.

 

[jrichker]

Possible vacuum leak, and yes, the carbon canister has two caps.

If you are having idle problems, see the "Surging Idle Checklist for help with all your idle/stall problems. The first two posts contain all the updates to the fixes. At last count there were 24 possible causes and fixes] for surging idle/stall problems. I continue to update it as more people post fixes or ask questions.