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4th Gen Ram Tech2009 - 2018 Rams and the 2019 Ram Classic: This section is for TECHNICAL discussions only, that involve the 2009 - 2018 Rams and the 2019 Ram Classic. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Hi guys! Just picked up my new 09 quad cab 4x4 with the hemi in it. I noticed around town the "fuel saver" light goes on, but at any speeds above 50mph it won't go on. Is it because its so new? (20 miles on it)? I had the cruise set and there was no wind and on level ground. What gives? Normal?
The MDS may take a while to start working all of the time. There was a notice in my owners manual. Same thing if you disconnect the battery.
The PCM needs to "learn" your driving habits. I think.
Ditto.
And there is no magic number where it cuts out, it is all about load. Now in most circumstances, you won't have a light enough load at 70 for it to stay in fuel saver most of the time save for going down hill. I had MDS kicked in at almost 75 last week down hill. Maintaining at 70 it is in about 50% of the time. 67 it is about 80% when maintaining.
I have only driven the truck once ( just picked it up today) so maybe it does need to learn. It does come on when i am decelerating from 60mph tho. It says I am getting about 16mpg on the hiway right now, but thats not bad considering it has to break in....I think.....hoping...
watch the water temp gauge , after 2000-3000 the temp will go down some?
Your milage will get better. The Hemi really scared me with thw mpg. I drive 40,000 plus a yr. I am getting better milage each week. 5049 miles now.