[Lov'n'Da'Catera]

So iv went for my e test twice now and failed both times. My first etest the car hadent been running for about 2 months, finally got it running and drove about three blocks and tried my e test but it failed so i figured that it just needed to get driven around a bit. So i put some off the shelf e test stuff in my gas, and drove about 900km, went back today to try again and still failed with little improvment from the first time.

So im in need of serius help/advise on what to do. Im passing my HCppm and CO with amazing results but im failing my NO ppm horribly!!

Here are my results from the first test:
- HCppm limit is 52 and i got 7, so i passed
- CO limit is 0.29 and i got 0.01, so i passed
- NOppm limit is 385 and i got 786, so i failed by far

Here are my results from the second test after e test additive and 900km driving:
- HCppm limit is 52 and i got 7, so i passed
- CO limit is 0.29 and i got 0.00, so i passed
- NOppm is 385 and i got 668, a little better but i still failed by far again

So does anyone know what my problem might be?

Has any ever had the same problem?

Every shop iv gone to so far say that if im passing HCppm and CO that my cats a fine and that my problem is heat essues. So baisicly every one thinks it could be my egr valve but problem is both shops that checked out my car cant find it under the hood or on there computers.

Does anyone know where it is located?