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Poor Gas mileage & Loss of Power "Solved"

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  #71  
Old 06-29-2009, 10:39 PM
mact
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I appreciate the buzz about the MAP.

I have a 97 w/318CIID ("5.2"). 145,000 miles or so. I'm pretty happy with performance and economy (had an 86 Commanche with 2.8 GM bent six that could hardly get out of it's own way and got 13-14 tank after tank.)

My Dak has gotten as low as 13.x to as much as 17.x on different runs.

I have a scan gauge that monitors different things: i watch TPS, MPH, inst mpg and avg (since last start) mpg on this trip.

How I drive (right foot position<G>) can make 5mpg difference. Easy.
 
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  #72  
Old 07-02-2009, 01:49 AM
Jdb107
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Great purchase. $118 less in my bank account after visiting Napa was worth every penny. I notice way better thottle response; not sure if its just mental or true, but myself and 2 friends notice that my exhaust (just recently installed flowmaster 40 series) sounds louder too. Ill test the MPG difference next gas tank- as it seems theres some sort of magnetic force always pulling the gas pedal down to the floor
 
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  #73  
Old 08-13-2011, 08:43 PM
bradmoore8
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Wow, I've been have lots of problems getting my 95 Dodge Dakota to pass emissions. I've replaced my egr valve and a brand new Magna Flow CAT. It sounds like it may be the MAP sensor like your Durango. Mine has the 5.2 and it Always is pinging at all accelerations. Running lean and hot. And I'm getting 12mpg highway. Did you have a high readings in your emissions or do they just plug the OBD2 in? Thanks for the post...
 
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  #74  
Old 08-13-2011, 09:07 PM
bradmoore8
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Anybody with a bad map sensor had problems passing emissions? My 95 Dakota will not pass AZ.emissions My NOX is very high my reading is 4.51 and max for the truck is 3.00 I've replaced my EGR valve and also put on a new Magne Flow CAT both of them parts only lowered my reading from 5.00 to 4.51 My motor is running very lean because I have a octane ping with 91 octane I was starting to wonder if my timing jumped.Anybody believe it's the MAP sensor? Or something else? Thanks everyone!!!
A emissions shop here said they could get it to pass for 200.00 but are they going to fix it or just tweak the truck to get the truck to pass. Yes I want it to pass but I don't want them to tweak it so much I burn my motor up. Because they aren't going to care once I leave.
 
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  #75  
Old 08-14-2011, 02:45 AM
magnethead
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I would venture that your distributor moved and threw the ign timing off...I replaced my MAP when i changed TB's, just for good measure.
 
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  #76  
Old 08-14-2011, 12:03 PM
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98DAKAZ
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Smile $$$

http://www.amazon.com/Sensor-56029405-5S2434-Dakota-Durango/dp/B0040PAKIS

$28.50

Brand New OEM Quality Map Sensor Will Fit List The Below:

Factory List Price is $ 118.00

Year Make Model Sub Model Engine
1997-1998 Dodge B1500
1997-1998 Dodge B2500
1997-1998 Dodge B3500
2001 Dodge Dakota Sport 5.9 V8
2003 Dodge Dakota Sport 5.9 V8
1997-2003 Dodge Dakota 3.9 V6
1997-1999 Dodge Dakota Sport 5.2 V8
2002 Dodge Dakota 2.5 L4
1997-2001 Dodge Dakota Base 2.5 L4
1997-2001 Dodge Dakota Sport 2.5 L4
1997-1999 Dodge Dakota SLT 5.2 V8
2000-2002 Dodge Dakota 5.9 V8
2003 Dodge Dakota SLT 5.9 V8
1998-2000 Dodge Dakota R/T
2003 Dodge Dakota R/T
1998 Dodge Durango SLT 5.2 V8
1998 Dodge Durango SLT 3.9 V6
2001-2003 Dodge Durango 5.9 V8
2000 Dodge Durango 5.2 V8
2000 Dodge Durango SLT 5.9 V8
2000 Dodge Durango R/T 5.9 V8
2000 Dodge Durango Base 5.9 V8
2000 Dodge Durango SLT Plus 5.9 V8
1998 Dodge Durango Base
1999 Dodge Durango
1997-2001 Dodge Ram 1500 5.2 V8
1997-2001 Dodge Ram 1500 5.9 V8
1997-1998 Dodge Ram 1500 3.9 V6
2000-2001 Dodge Ram 1500 3.9 V6
1999-2003 Dodge Ram 1500 Van
1999-2001 Dodge Ram 1500 Van 5.2 V8
1997-2002 Dodge Ram 2500 5.9 V8
2001 Dodge Ram 2500 Van 5.2 V8
2001 Dodge Ram 2500 Van 5.9 V8
1999-2000 Dodge Ram 2500 Van
2002-2003 Dodge Ram 2500 Van
1997-2001 Dodge Ram 3500 5.9 V8
1999-2003 Dodge Ram 3500 Van
1997 Dodge Viper Base
1998-2002 Dodge Viper
 
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  #77  
Old 08-15-2011, 05:18 PM
bradmoore8
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Default Failed emissions..

I found out the main problem they were testing my truck with the O/D ON!!!!
Also I put 3/4 of a gal. of alc in 6 gallons of fuel. When I got there I asked the manager about the O/D being off or on. She said it must be tested with it off because there mainly testing city driving. I believe that was the whole problem. So be aware of this. Thanks to the gentleman you made me aware of this....On my 95 Dakota once you start the truck you must manually turn the O/D off by the button near the headlight switch. The O/D switch will be lit. Make sure your tester does this before putting the truck in drive to begin the roller test. Thanks to all!!!!
 
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  #78  
Old 03-28-2012, 07:30 AM
mgaither0
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bookmarking for later to have to read
 
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  #79  
Old 03-28-2012, 05:49 PM
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jondakotaguy
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I bought a Delphi which is who makes alot of the OEM parts you get from the dealers.. Ford, GM and so on.. for 22 bucks.. I like that alot better than cheap-o Standard or that "O.E.M" cheap brand..
 
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  #80  
Old 04-06-2012, 11:48 PM
GMH
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Default MAP sensor wiring

Hi everyone,

I have a 04 Dakota, 4.7L with the cheaper map sensor. Getting 13 mpg. I probed my map sensor and get 5v on the first wire, 0 on the second, and a signal on the 3rd. The haynes diagrams says it should be 5v, signal, ground.
I get about 1.3v while idling. and it drops to 0.5v at full throttle. opposite of what it should be. Can anyone verify what the wire colors should be at the connector? The haynes book only tells you the colors but not the orientation on the connector. I wanna make sure the wiring is not faulty before I put in a new sensor.
 
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