3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Long time lurker, first time poster. I've got a 2004 Ram with the 5.7. At low cruising RPM's (1100-1500) I'm getting what feels like a hesitation, RPM's drop a few hundred, feels like you've hit the brakes or got completely off the gas. Only while driving at these RPM's. Idles smooth, no hesitation if I stomp on it, no hesitation with the cruise on or driving at highway speeds/RPM's. It will do it with the cruise on at the 1100-1500 RPM range going 35-45 mph. Feels kinda like the torque converter is locking and unlocking. No check engine lights. Any ideas before I start replacing/tearing up parts? Plugs are getting a little old, I'm praying it's not a transmission problem as it is in that RPM range where it feels like it might be wanting to down shift but then gives up. Thanks for any ideas.
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I have this exact problem, I mean I have been searching the internet and this decription is EXACTLY what is happening to me...I just put fresh plugs in it and thought it might be the plugs but now I am leaning toward the EGR...
Through learning the truck I believe I have found that it is the mds kicking in and out. If in tow/haul mode the hesitation isn't there. I am saving for a turner so I can turn the mds off permanently. Hope this helps.
__________________ KANSAS OUTDOORSMAN 2007 Dodge Ram 1500 Hemi 4X4 Rancho Quick Lift w/33" Toyo Open Country A/T's