Because there are three assembly plants total that build Ram trucks. Mexico, St. Louis, and Warren, MI. Mexico does heavy duty only so they are just now building the new Rams. St. Louis and Warren build the 1500's. Changes don't get introduced at the same time at both plants. When I was told that the VVT engine was introduced at the same time as the fuel saver light, that may have been for one plant, but not the other. Whenever you have more than one plant that build a common vehicle, you cannot use build date as a for sure way of knowing if you have a change or not.

 

My Hemi has an August "08 build date and is an MDS VCT engine without the light. It sat on the dealers lot until June 9, 2009 at which point, this dealer, was booted out of the clan and on that day gave be a drop dead great deal price on the $42,000.00 unit. He told me that he had to pay Chrysler $1,700.00 each to take his Chrysler/Dodge stock. Talk about being SCREWED!!!!

 

My '09 has a build date of 12/12/08, it has the locking tailgate, Fuel Saver light, and the VCT engine

 

mine was built 10/08 too (10/15/08 IIRC), and no light for me. dammit

 

I feel your pain man

 

To those who have the light does it do anything for you knowing that you are running 4 cylinders? Do you try hard to keep in, I drive mine so that the dam thing won't come on. I wish there was a way to get rid of it to tell you the truth.

 

Why? It doesn't affect performance, and it increases gas mileage.

You can turn the light off through the EVIC.

 

2009 Dodge Ram SLT QC Built 2/09 VCT with Light. You can't feel the shift to 4 cyls when it occurs or when all 8 fire up again...because the pistons are still moving mainly. You really won't notice it is even there...with the exception that you see the light and try to drive it more which is distracting....along with the MPG calculations.

 

I have to disagree. I can feel it kick in an out. Granted it is nothing bad at all, but it is there. It is also more noticable kicking in an out when at slower speeds (under 40). I have also noticed RPMs change when it comes on. Mine will go up about 50 or so when it kicks in.

For those that want to know....

Build was late feb early march
VCT (must have been one of the last) with MDS light.

 

you can definately feel it going in and out of MDS mode and since I did an exhaust mod, now you can definately hear the difference..