[Sam Cler]

The IAT mod will worsen your fuel economy. It will read a cooler intake charge and pump more fuel into your cylinders.

Better fuel economy through sensor mods would require advancing the timing, such as the CPS mod.

The fuel flow isn't directly effected by the tire size or gear. If you don't recalibrate your speedo after you get a different sized tire then your mpg will not be correct.

If you have a numerically smaller final gear ratio (bigger diameter tires without re-gearing,) then during acceleration you'll be loading your engine more and dumping lots of fuel in there. Having a numerically higher final gear ratio (smaller diameter tires or higher numerical gears,) will give you better mechanical advantage and load the engine less.

On the freeway the opposite will happen. Because you don't need a lot of horsepower to maintain a constant speed, a numerically smaller final gear ratio will give you better fuel mileage.

 

[JoesZJandRT]

The IAT mod will worsen your fuel economy. It will read a cooler intake charge and pump more fuel into your cylinders.

Ok, this clarifies what my rambling was about... Thanks... I was under the impression that a colder temp reading would cause the engine to run lean b/c of the more dense charge of air... and that with warmer readings it would cause it to pump more fuel to the engine... I see that I had that completely bass ackwards... However, I have also been under the impression that most engines perform better in more lean fuel/air ratios.

Better fuel economy through sensor mods would require advancing the timing, such as the CPS mod.

I don't think the Jet chip will allow me to do that will it? I want to get optimum performance and mileage out of this vehicle the way I have it, so i want to do everything I can to make it do just that.

The fuel flow isn't directly effected by the tire size or gear. If you don't recalibrate your speedo after you get a different sized tire then your mpg will not be correct.

So in a sense the odometer/tripodometer are off too? Or is it just the computer? I have the jet speedo calibrator for this, not yet installed, but I'm really curious as to how far "off" my jeep is as a whole...

If you have a numerically smaller final gear ratio (bigger diameter tires without re-gearing,) then during acceleration you'll be loading your engine more and dumping lots of fuel in there. Having a numerically higher final gear ratio (smaller diameter tires or higher numerical gears,) will give you better mechanical advantage and load the engine less.

On the freeway the opposite will happen. Because you don't need a lot of horsepower to maintain a constant speed, a numerically smaller final gear ratio will give you better fuel mileage.

This I understand. The numerically lower gearing will make you use more of the pedal to get up and go. My driving is generally 55-70 mph for about 20-30 miles.

And to keep on topic...
#1--You can do some engine dress up with wire covering, just replace the old/dirty covering to make it look better.
#2--You can also go in and clean up ratnest wiring by re-routing and using black electrical tape to conceal all of it wrapping it tightly(this also helps prevent wiring problems).
#3--Take off body panels, fender liners, cowl grills, grills, and anything that comes off and clean under it, you'd be surprised what you will find and how much cleaner your truck will look.

 

[thegreendak]

spark plug gaps
advance the timimg
no tailgate

tell me more about relocating those sensors I'm not that great with sensors and shit

the no tailgate thing is actually worse for you. again with the mythbusters... they did an experiment with the tailgate up and with it down. there is air in your bed swirling around when driving when the tailgate it up. this causes air traveling over the truck to roll right off and not go into the bed. with the tailgate down, the air traveled over the truck and down into the bed. causing it to push the rearend down more.

that experiment was for gas mileage...

 

[00dakotav8]

They proved having the tailgate off completely, because of the weight loss, was more efficient.

 

[aka ryan]

Don't know if anyone's posted this already, and if they have I'm sorry. This is a bad ass do-it-yourself list or tweaks in PDF form. Check it out!


http://www.bionicdodge.com/Download/Speedtweaks Tips And Tricks.pdf

 

[Krown]

Would the same procedure be done (in regards to the TMR mod) on a 4.7 2000 Durango?

 

[Krown]

Am I looking at the right yellow/green wire? This is what I found right next my intake box. In the third picture, I am looking at the wire 3rd in from left (second to last) on the top row. Does this seem right?

Sorry for picture quality, only have a camera phone to take pics with as of now.

 

[Krown]

Anybody know?

I don't really know much about electrical stuff as far as in the engine, so could anybody at least tell me if I'll have any long term effects if I cut this wire and its not the right one?

 

[encorejc35]

oh yea, chopped a/c, always rollin with the windows down

 

[RaginDmon]

If people are still reading this thread for free mods, this one might help. A buddy of mine that I work with used to race called it "indexing the spark plug". When you switch out your plugs, place a crush washer (star washer) on the thread end of the spark plug. Use a sharpie to make a line on the porcelain opposite the gap. When you tighten down the plug, the crush washer gives you just a little bit more room so that you can look and line up the mark that you made. When you do this, the gap should be directly in line with the fuel in the combustion chamber. Don't know if this helps with HP, but it makes sense for better combustion.

 

[redneckbaker]

Pull the "Torque Management Request" wire that runs between the PCM and the tranny controller... gives MUCH firmer shifts

i have been trying to do this mod for a month and can not find the wires i even went to y2kota's website and saw the pics and i do not a hve a wire there i have a 01 with a 4.7

 

[Citrus Dragon]

sub

 

[burningrubber01]

http://www.dakota-durango.com/forum/showthread.php?t=77672

 

[MoparMan0101]

thanks for all the ideas!

 

[Sick_Durango]

so i did that TMR mod and i took it down the street and the first time it shifted from first to second i could feel the difference but then i turned around and tried it again and it shifted at like 3500 rpms. i came back to the house and unplugged the battery and took it out and it did the same thing. I dont want to hook the wire back up but if i cant figure out the problem i dont really have another choice. Any help would be appreciated.

 

[Sick_Durango]

Anybody know?

I don't really know much about electrical stuff as far as in the engine, so could anybody at least tell me if I'll have any long term effects if I cut this wire and its not the right one?

I did this to my 4.7 and now for some reason it shifts at 3500 Rpms. Im not sure what it is yet. Hope this helps

 

[SHDurango]

Does anyone have a pic of the wire to be cut? i cant seem to find the plug

 

[wingerak92]

Well, for those who don't want to do this TMR mod for free, apparently the Superchips deletes this function without cutting wires

 

[024.7durango]

02 durango 4.7

You say you dont have a clutch fan is that correct if so how long, and have you had any overheating probs with this or have you added one of these flex lite or such fans?

You're right, I found an old post of mine on another forum and I had clipped #13 pin on the PCM as well... The #10 pin is where it plugs into the TCM... really sorry for the confussion there man, it's been ages since I did this...
Hmmm... have never had that happen... could definetly have been the computer... did you maybe have O/D off and not realize it?
Dunno man, I've removed my clutch fan as well and I just run the stock electric fan but I never had that problem, and as far as I know, no one else has had that happen as a result of the TMR mod... atleast it's running normally now...
LOL, I know exactly what you mean... I don't know how many time me going "shit..." and turning the radio off to listen to something has been followed by my girlfriend turning to me and saying "What? What have you don to it now??" :jester:


Glad it worked out for ya in the end and all the issues seem to have cleared themselves up quickly!
:banana2:

 

[99R/T-Kota]

i havent ran a fan on my truck for probably over a year now, i do have a flex-a-lite that will be goin in sooner or later, my truck will get a lil hot in town, like for long red lights, and sitting still for long periods of time, but a low speeds it stays cool no probelms for me, but i do run a 180* stat,