I have been looking for weeks now trying to see if someone has had this problem and solved it. recently when going into lean burn it drops in hard like a big stumble. And after that it stumbles and slowly drops speed until I am forced to come out of lean burn. It runs better in warmer weather. I have taken the intake off and drilled/cleaned the egr ports, nothing changed. From my reading on the form it is very rarely the actual egr valve. I have run a compression test with the results of 190, 175, 190, 185. I think this should be ok? Any help would be greatly appreciated!
It is all the time once in lean burn. Worse when climbing a hill but even on flat ground it is unable to maintain a speed. I will have to check the part number tomorrow and get back to you on the o2 sensor.
where is the part number? i looked and can not find it. Also this is not only on climbing hills. this happens even when going down hill. The car ran great last summer and this winter until late. it seems to run better if the outside temp is above 60... idk if that helps diagnos the problem?