new to the forums

[Dave]

The PCM tuning will give more power and if you keep your foot out of the fun pedal you can actually increase mpg's since the engine does not have to work harder.

The only proven way to keep or increase mpg's is to keep up with the maintenance(plugs and such) and to regear.

That, and only drive downhill.............:smokin:

Dave

 

[cj3waker]

The PCM tuning will give more power and if you keep your foot out of the fun pedal you can actually increase mpg's since the engine does not have to work harder.

The only proven way to keep or increase mpg's is to keep up with the maintenance(plugs and such) and to regear.

wouldnt all the standard performance options increase power and require less work from the engine?

regearing to 4.10 will increase MPG? I would have thought the opposite

 

[rockymountain]

wouldnt all the standard performance options increase power and require less work from the engine?

regearing to 4.10 will increase MPG? I would have thought the opposite

With bigger tires your engine will work harder to turn them. With 4.10s it will work less to turn them.

04lanekj -- if you're getting 13mpg you need a serious tune up.

I'm lifted 3 inches with 245/75 GY duratracs and I'm getting 16.5 all city driving. I think I'm getting around 20 on the highway but not sure, haven't taken a trip for a while.

 

[LaneKJ]

04lanekj -- if you're getting 13mpg you need a serious tune up.

Any possibility it could just be the EVIC reading it wrong??

Sorry to hi-jack this thread btw.

 

[tjkj2002]

wouldnt all the standard performance options increase power and require less work from the engine?

regearing to 4.10 will increase MPG? I would have thought the opposite

There are no "standard" performance options for the 3.7.

If you plan on doing 80mph on the highway then lower gears will make it worse or gearing to low,which is not possible on a stock KJ.4.10's for stock through 245/75's(31" tires) is great,so-so for bigger.265/75's on a KJ really need 4.56's.