I own a 1999 Ford Expedition - Eddie Bauer - 4 wheel drive - 5.4 Liter:
I am having trouble passing emmissions. My car is also " lurching" when I start to go or hold it at a constant speed (especially 35 mph). I have also noticed pinging. I just had to replace the battery (not sure for what reason, old or what). If anyone has any suggestions as to what this could be or if you have had this problem I would really appreciate a response! Thanks!
PS - one of the emmission codes suggested EGR valve and said catalyst system not ready.
Friday, September 21st, 2007 AT 12:25 PM