96 with EGR codes being thrown

I have a 1996 Blazer LS 4dr 4x4 with 118000 miles on it. The Service Engine Soon light keeps coming on. It is throwing an EGR valve code. I just had the car tuned up and had the EGR valve replaced. Problem is that it still throws the code intermittenly. Both my dealer and a second mechanic have verified that the EGR valve is working fine. The dealer stated that the ECM may be going. Any idea's on what could be causing this? :banghead:

What was the code number and were there more than just one?

The dealer states : "Found code P1406 EGR Position performance. Inspected, EGR working properly when commanded ON and OFF. Cleared codes. Test Drove. OK at this time."

Sure at that time, but it keeps intermittengly throwing the same code.

I've also had a PO300 - Misfire and a P1441 - Purge valve. But thoose have gone away since the tune up.

Code 1406 is a egr valve pintle position CIRCUIT problem. Not performance.
If your are going to fix it yourself and have a good engine capable scanner.
I can post a repair flow chart for that code .
But if you re going back to the dealer.
Here is a tip.

Tip on going to the dealer
Ask that only a factory certified gasoline engine performance specialist work on your car.
Not all dealerships are concerned with how repairs are dispatched, and not all dealership techs bother to take advantage of the training offered by factory (the vast majority of which is paid training). If the dealer is uncooperative, ask for your money back and call around for a dealer that will accommodate you.