Vx can not maintain a speed in lean burn.
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!