Is there a way to improve fueleconomy on 4.7 L 4X4 Durango's
I was told there is a businness in the Chicago area that re-programs the ECM for improved fuel econimy on many Chrysler products. I heard of this about four yeears ago but haven't heard or seen anything since. Does anyone have any experience with this. Mine gets the EPA rated economy, but I would like to improve that. I tried a KN cold air intake, but there was no improvement.
Re: Is there a way to improve fueleconomy on 4.7 L 4X4...
Swap in a tcm for 2002 to 2004 jeep grand cherokee with a 4.7 and 545rfe transmission. you have a 45 rfe transmission and it is identical on the inside to a 545rfe. type in 45rfe to 545 rfe conversion on google and follow the dodge threads that come up for more details.
Re: Is there a way to improve fueleconomy on 4.7 L 4X4...
My two cents as an observer: I have a Dodge Durango and my brother has a Ford ??? Suv. In an attempt to uncover ways to improve mpg economy we have talked to numerious individuals and in addition checked resources on the web, other. Our conclusion is that unless the mfg. has found a way to compensate ( by design change) for a 'bad' program in the computer what is there is what you have. From the standpoint of the computer It would seem that a program could experience a glitch and would have to be flashed again to restore (or improve with an upgrade program).
Advertisements for 'chip' driven devices that can be installed on the vehicle will analyse driving habits which could work to make improvements to save fuel. However this is really created to introduce the driver about human changes in driving that might help. Basically this is the only improvement that can be realized. These devices may help improve the drivers habits which could improve mileage but it is in the same ball park with regular maintence suggestions of maintaing optimum performance of parts (plugs, wireing, proper gas quality, tire inflation, etc.) It may be that some of the chip devices on the market to improve performance MIGHT have some benefit in improving POWER under load (hauling) but it seems mileage can't be tweaked mechanically or electrically. Personally I don't think added power can be created without engine modifications..
Exchanging the vehicle for another with better gas mileage, parking or driving less seem to be the only options to reach the improved economy goal.
I would appreciate and welcome any information that would have me change my mind.
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To improve shift feel, the transmission control module (TCM) may request that the engine control module (ECM) reduce engine torque during shift events. When such a request is received, the ECM responds by retarding the base ignition timing and notifying the TCM that the request has succeeded. If the ECM is unable to comply with the request, the ECM sends the TCM a message that the request has failed.
The torque reduction request is sent to the ECM through a communication network called the controller area network (CAN). Two circuits are used to communicate CAN data between the ECM and TCM. A fault in the CAN will not cause DTC P1780 to set by itself. If a CAN fault occurs, other DTCs will set before DTC P1780.
When the TCM receives a torque reduction failure message from the ECM, then DTC P1780 will set. DTC P1780 is a type C DTC.
Take your pick of which you think this code is for , this or the TSB - technical service bulletin. What need to hook up scan tool an data PID'S - Do you know what PID'S are ? sensor data read on a scan tool .
to get an an out of paramaters setting for the air fuel mixture in the ECM I would consider a change in altitude of around 3000 feet would be necessary before the ECM would need re- programming
I would suggest that you run the fault codes as the MAP/BARO sensors may be faulty
also if the driving conditions have change ( flat to hilly) will account for lower fuel economy
I had a grinding noise on my 1997 Cadillac Deville Limousine and I tried some 'Bar's Leak' Power Steering Fluid that claims to quiet down noisy comopressors, and to thicken and lubricate. So, I tried it 2 days ago, and ran it 100 mi. like it said, and there WAS an improvement in the worn out Power Steering Pump. The cost was like $11 for the product at Walmart, including getting a Turkey Baster to remove the old fluid in the reservoir, that would overflow if I added the whole bottle. I used 1/2 of a bottle and it did seem to improve the sound of the belt driven pump which I gather has worn out splines and bearing inside after 126,000 mi. or so. It certainly was cheaper than spending $500 for a new pump to be installed including evacuating the a/c which I was told was necessary on my particular vehicle.
Hm. $11 last chance try vs. $500. So, I tried the $11 fix and so far it is so much better, that I don't plan to have the power steering pump replaced.
this depends on which type you buy. some just plug into your OBD port under the dash, and some will plug into an accessory port under the hood but when you buy one it should have instructions on how and where to install it. i know this is sort of a vague solution but really its as accurate as i can get. if i may i would like to offer you a suggestion on which one to buy. the super chips tuner chip is the best all around performance chip it improves your gas mileage by up to 3% (which may not seem like much but every little bit counts right) and gives a small bit of horse power gain the thing to keep in mind is, when you get one and install it the results may not be immediate. it will take your car a few drive cycles to recognize it, and make the necessary changes to the computer program. It will then start telling your fuel system to push less fuel and increase the throttle response and change the shift points in your transmission programming. all of these things combined will give you the economy and power you seek. there are cheaper chips out there but be careful because i bought one of the cheap ones and it caused my computer to go haywire and forced me to remove it and get a dealer to reprogram both the ecm (engine control module) and the bcm (body control module) to get it to run right without and codes. i have had great results from mine. after changing to full synthetic oil, a k&n air filter, E3 spark plugs and a super chips tuner chip I'm getting 22-24 mpg out of my 2005 Dodge Durango with a 4.7 liter v8 i couldn't ask for more. i hope this helps.
My Durango did the same exact thing. It would seem it was shifting from o/d to third constantly while driving down the road. As it turns out, it was the throttle position sensor. This may or may not solve your problem, but is a good place to start.