So I have an 05 Dodge Ram 3500 QCLB 5.9/auto. Ive had some problems with my MAP sensor, it got wet one rain storm or snow storm. I was driving in and really wasnt a problem untill I started to notice the power decreased and my milage went all to hell. I even took it to the stealership for warrenty, but they couldnt diagnose it. They told me its my Bullydog outlook monitor that was the cause and its not even hooked up. Its been a few months running it like that, even cleaned it out and greased it, and I know I should have replaced it sooner but boy am I glad I did. I just got back from a trip throught the mountains, about 900 Kilometers (560 ish miles) and still have a third tank of fuel left. And thats hard driving. Last time I did that trip I had to fill up every 500 kilometers.

Oh btw, I have a titan tank, so I have a little bit more range than stock.

 

Did you have a code for it? What led you to the MAP sensor?

 

I did have codes for map sensor low voltage I believe it was.

 

How are your temps now? Weren't you running hot before?