rock_doctor said:
The egr on my X was replaced last week with 4,200 miles on the clock. Mech said it was clogged...
mark
I quoted the post above, but I know many others have this issue as well.
I am a firm believer that using a quality fuel additive that lubricates the injectors (due to low sulfur fuel) and assisting in a cleaner burn is what makes certain peoples trucks run well, and others that do not run poorly. The cleaner I burn helps reduce carbon deposits on the EVR valve... when it plugs, it plugs!!! Running on the highway for a period will clean some of this out as well. Extended ideling is bad for EGR valved motors and is not recommended (look around on the internet). The low idle speed does not produce enough heat to keep the carbon off the EGR valve body and it will then stick!!!
I run PowerService in the grey bottle (full strength) - 32oz per 44 gallons (only needs 1/2 of this amount for 50 galloins. Others use other brands, but making for a cleaner burn and lubrication issues are key with the crappy low sulfur fuel we all have to use (and it will get worse due to the EPA).
I have 53,000 trouble free miles on my 2003 Excursion.
Good luck,
Jeff