Why would that valve cause problems only in the morning? Was the battery recently disconnected or run dead? If so, there's a real easy fix. You can randomly replace all kinds of parts but that will just introduce all kinds of new variables into the mix and cost a lot of wasted money. We pay mechanics to diagnose problems, not just throw parts at it hoping to solve it.
None of the parts mentioned will cause stalling when coming to a stop. More importantly, you will never solve a stalling problem on a Chrysler product by replacing the fuel filter, (except on a diesel). The fuel filter, if partially plugged, which is very rare, will cause stalling when it must pass the largest volume of fuel, which is during coasting. If your van stalls during coasting while still at highway speed, suspect a plugged pickup screen attached to the fuel pump housing.
If the engine will stay running when the van is stopped if you hold your foot on the gas pedal for a few seconds, then it idles fine by itself, you could have a stuck open EGR valve. The engine computer will have to see the low idle speed, then command the idle speed motor to raise engine speed. The idle speed motor won't do a thing if the battery was disconnected until it relearns minimum throttle. Certain conditions must be met for this to occur. To do the procedure, simply drive at highway speed, then coast for at least seven seconds without touching the brake or gas pedals. Done.
Depending on which engine you have, the idle air passage could be plugged with carbon. The computer will request an increase in fuel to hold rpm steady, but the engine won't be able to get the necessary air to go with it. This used to be common on the 3.0L engine, but isn't so much now with better fuels. More air is needed in cold weather, such as in mornings. This could explain why it runs better in the afternoon. As this problem gets worse over time, it will affect engine performance all the time.
Saturday, August 29th, 2009 AT 2:14 AM