Yep that's how mine was.

 

Thanks rpowell, was just confused as the repair manual says it has 2 screws.

 

My local dealer is quoting $128 for the map sensor and various places online are around $100. How are you guys getting these so cheap!?

 

the 3.9/5.2/5.9 have a different, more expensive map sensor, whereas the the 3.7/4.7 have a cheaper model. i got the map for my 3.9 for $88 from a dealerships website, however after tax and shipping it was $100 even

 

Huh, I have the 4.7

 

You may want to check with a different dealer... as I mentioned mine was only $29, and that's Canadian $$

 

BrandonT and anyone else for that matter with the 4.7, try www.dodgeparts.com .

 

If you guys are getting r@ped by your local dealer, I can buy the map sensors here and ship them to you. You can shoot me money through Paypal plus maybe $5 for gas because these sensors for the 4.7 shouldn't be more than $30. Anyway let me know if you guys want me to do that for you. D@MN STEALERSHIPS

 

Ok, here is a couple things to think about. First of all, not everyone with a 4.7 is going to get the same exact mileage due to driving styles, conditions and how your truck is optioned out. For example, my current 2002 SLT Durango with 4.7 gets around 13.5 average for city/highway combined during everyday use, which really sucks. We had another exact same model Durango we lost in an accident that got at least 2 mpg more. How is that? Our current truck is AWD, where as our first was 4x4. I just replaced the MAP sensor due to the info on this thread and noticed no difference in mileage, but the pinging stopped that was present when stomping the gas. Whether the vehicle is 2WD, 4WD, AWD, etc. that will all make a huge difference. My front axle is always turning with the AWD, which burns more fuel. Now, for those of you who didn't realize, which by the sounds of it most don't, there is two different part numbers for the 4.7's based on which engine controller you have. I have the NGC controller, (Next Generation Controller) which costs more for my MAP sensor at Autozone ($97.99 roughly), but cost $23 at the dealership. The other controller is the JTEC (Jeep Truck Engine Controller), which is a cheaper MAP sensor at Autozone for $26.99. I'm not sure what the cost is at the dealer for that one since I don't need that one. Anyway, I'd check the dealer to make sure the price you are quoted is for the part you're inquiring about. If you aren't sure which sensor you need, just look at the part number on the sensor. You can see it without even taking it off! The 4.7's are right on the front of the manifold, between the alternator and a/c compressor. I also don't think that just because the volts are off 1 or so on a used sensor that it's going to cause that much difference in the mpg, which is evident in some of you guy's findings. Just change it and cross your fingers. O2 sensors are next for me, hope it works!

 

If, you ever tuned a car, you will realize how important map and maf sensors are. I'm not talking about using a hypertech or superchip. I'm referring to actual tuning of the fuel map. The map or maf sensor tells the ecm where on the fuel map, ignition timing, etc. at a given voltage from the sensor to use for calulation for injector pulse. If, the map or maf is off then it will give the truck wrong information. That's why people with bad or failing sensors see an improvement.

The guy where he noticed that his truck can go up a hill with minimal throttle and able to sustain his 70mph speed uphill after his sensor replacement. The ecm was decreasing timing due to false sensor readings.

Your knock issue would probably be, the ecm was not giving the truck enough fuel as it read improper manifold pressure. Meaning your truck was running lean.

I can't stress how important the map & maf sensors are to any car or truck.