Yesterday I decided to check the computer for error codes after dealing for weeks with rough iddle and poor gas milleage. I used an actron/// scanner and performed a "key on engine running" test, the computer gave me two error codes, 21 and 32.
The book that came with the scanner describes the following...
Error 21: Engine Coolant Temperature (ETC) sensor signal voltage: not at normal operating temperature or loss of signal.
Solution: Replace the ETC sensor? It has never been replaced.
Error 32: EGR Valve Position (EVP) sensor or Pressure Feedback EGR (PFE) sensor - signal voltage is below closed limit or has gone beyond set limits. or, Problems with EGR valve controlling.
Solution: Replace the EVP sensor? I replaced the EGR valve 2 months ago and the iddle improved, finally noticed a change in the engine's rpms when it was started cold till it reached normal temperature. the sensor is the old one that came with the car.
Thank you very much for your help.