Originally Posted by azu
Originally Posted by willwren
You don't have that tube. You have an L36, which is EGR-fed through the bottom of the UIM. You can see it with the TB off.
Make sure you're not suffering from the proverbial L36 UIM erosion. All L36'* will, and it will cost some the entire motor.
I know mine was replaced sometime after 6-03 which is the date on the Delphi UIM.
It'll happen again. The clock is ticking. It should be a Dorman or APN. We've seen 02 and 03 manifolds fail. I've got one here that did.
This could very well be your problem. Are you losing coolant?
Correction. Series 2'* do have the LOWER tube to the manifold. Not the upper tube the Series 1 has. Check that tube between the rear exhaust manifold and the LIM. The Series 1 has a tube entering the front of the motor up high. Threw me for a minute.
A leak between the valve and the LIM will cause a lean condition and poor idle. But not between the valve and the exhaust manifold.