Bought a 2005 4.7L QC Ram 1500 a couple months ago, and at the time of purchase and test drive seemed to have no issues. But after driving it for a week or so, I began to notice that after driving for work and coming to a complete stop at traffic lights that the idle if the truck would seem really jumpy, even stalling at times. Looked around on this board and thought it may be a TSB computer upgrade needed to solve it. Had that upgraded at the local Dodge dealership for about a $100 pop, but still the issue exists. I've seen other posts suggesting it may be a Idle Air Control valve. Just wondered if anyone had experienced a similar issue so I may know what to expect when I take it for service. Thank you!

 

Steven, Welcome to Df. I just looked and there are no TSB's pertaining to your problem. It does sound like your Idle Air Control Motor is not working properly. But if I am not mistaken it works in conjunction with the MAP sensor to keep from stalling. Some others will chime in here I am sure, especially if they have had a problem similar to this....

 

Thanks for welcoming me! And congrats on newly becoming a moderator, seems like you have plenty of background and knowledge to be a perfect fit for the position. What exactly is a MAP sensor? And are these issues easily fixable/replaceable by an everyday DIY type of guy, or should I let an experienced technician handle the work? Thanks again.

 

Thanks, The Manifold Absolute Pressuse sensor is its propper name.
The PCM uses the MAP sensor input to aid in calculating the following: [ul][*]Manifold pressure[*]Barometric pressure[*]Engine load[*]Injector pulse-width[*]Spark-advance programs[*]Shift-point strategies (certain automatic transmissions only)[*]Idle speed[*]Decel fuel shutoff.
[/ul]Have you check to see if any codes are stored in the PCM. Autozone will do this for free. If either of these is bad, replacement is something that you can do yourself.

 

Learn something new everyday! I think I'm really going to like having this forum as a reference point during the ownership of my RAM. I will be going to Autozone tomorrow and will report back any findings. Thanks again!

 

A faulty MAP sensor will almost always show a code, if nothing shows up on a scan, then try a good cleaning of the throttle body. Do a search on here, there are posts on the proper method to do it. It's a common cause of erratic idle and stalling issues. Also, a bad EGR valve is another common culprit, but again, like the MAP sensor, this will usually result in a code being thrown...
Those are not the only things that can cause your issue, but are probably the most common three...

 

Well, I went to Autozone, the trusted name in Automotive service, and they weren't able to pull any codes from my truck. The technician recommended some Isoheat and Fuel Injector cleaner. So I added them to my gas tank and filled my truck up, so maybe/hopefully a cycle through with those will smooth things up. I was also searching around for a how-to on throttle body cleaning, but all I could find was steps for the 5.7L, and mine's a 4.7, how much variation would there be in the actual process that being said? And any other suggestion I am open to, thanks in advance!

 

I have the same year and engine and mine does the same thing. Have no idea what it is

 

Fellas ...

This is not a new issue. Do a search on the forum and you will see many of us complaining about he same issue. Dodge doesnt know how to fix the issues.

 

Oh yeah ... and it happens to both the 4.7 and 5.7 ..