Quote Originally Posted by Y33TREKker View Post
Might be that your EGR nut has come loose. The EGR valve is between the intake manifold and the firewall, and the nut threads UP into the bottom of the valve. There have even been cases where it's come all the way out of it's threads and has been found just spinning at the bottom of the EGR tube.

(Similarities from another thread) http://www.vehicross.info/forums/sho...hlight=egr+nut

Mine did the same thing a couple of years ago, resulting in a "dieseling" sound during acceleration. If that's the case, a simple re-tightening of the nut with a 22mm wrench should do the trick. At the time, I also applied some anti-sieze to the threads before tightening, and while I can't say for sure that the anti-sieze helped it stay tight, I do know that it hasn't happened again.
Much obliged. I'll check it as soon as I can. It was about a quart low after about 1000 miles of driving. I know that's within spec to Isuzu, but not for me. I'll be replacing the PCV and EGR soon. Which part of the EGR tube should be replaced? I know there are two parts. I just don't know which one clogs. I've got my fingers crossed that this will eliminate the oil burning for a while.