Chrysler Repair: 00 minivan 3.3L V-6: egr valve code 0403, side exhaust manifold, chrysler grand voyager


Question
Continuing with other conversation. I have not traced the wires to the EGR. It is a 2000 Chrysler Grand Voyager, 6 Cyl 3.3L. Where would I find the EGR valve, the wires you mentioned and the valve stem that may be gummed?

Answer
Hi Tim,
The egr valve is mounted on the rear of the intake manifold. If you look at the right side exhaust manifold, just to the rear of the oxygen sensor, you will see a small diameter pipe running toward the rear where it meets the egr. It has a round vacuum operated top piece, the body of the valve which attaches to the pipe, and between those two parts is a flange inside of which you will see a rod, horizontal, with a slot in the stem. There is also a vacuum hose attached to the top of the valve that comes from an electrically operated transducer mounted slightly above and forward of the valve, which controls the vacuum applied to the valve through a hose between them. The electrical part is at the transducer: a white/black wire which should show 12v when the ignition is in 'run' position, and a gray/yellow wire that goes to the pin 40 of the pcm. So check out the valve action as described earlier*, and also verify the voltage and the connection to pin 40.
Roland

*"check to make sure that the valve stem is not gummed up such that it is either not opening or not closing tightly. Use the tip of a screwdriver in the slot of the valve stem to move that back and forth, against spring-action in one direction that attempts to close it. If it is sticky or doesn't close to a dead stop by the spring-action then spray some WD-40 on the stem where it enters the body and work the stem some more to free up the action. See if that solves the engine performance issues you had earlier and also keeps the check engine light/0403 code from reappearing.
At 235K though I would believe the egr valve is pretty gummy.