My MPG Thread
10-09-2012, 10:26 AM
#16
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Year: 2001
Model: Cherokee
Engine: 4.0
after long trip today from full tank to E ( it was real E see the pic ) when gas light go on you can drive 25-30 miles (and still running) after how many miles from light on it well shut down ?
got 330 miles mix driving city-hightway 80 Mile speed
got 330 miles mix driving city-hightway 80 Mile speed
Last edited by weld3z; 10-09-2012 at 10:45 AM.
10-09-2012, 09:51 PM
#17
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Year: 2001
Model: Cherokee
Engine: 4.0
[QUOTE=weld3z;2067446]after long trip today from full tank to E ( it was real E see the pic ) when gas light go on you can drive 25-30 miles (and still running) after how many miles from light on it well shut down ?
got 330 miles mix driving city-hightway 80 Mile speed
Man that's great fuel economy. Mine is bone stock and I average 16.5 with mixed hwy/city driving. My last tank I averaged 14.5 with mostly city driving.
got 330 miles mix driving city-hightway 80 Mile speed
Man that's great fuel economy. Mine is bone stock and I average 16.5 with mixed hwy/city driving. My last tank I averaged 14.5 with mostly city driving.
10-16-2012, 07:47 PM
#19
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Year: 1988
Model: Cherokee
Engine: 4.0
Installed! PCM reset, and o2 sensor took a crap...never touched it
Header, changed the tone, and its quiet!
99+ Intake changed the power band, and made it soooo much smoother
Fresh NGK o2 sensor...sucks it went bad...whatever, cant hurt.
my only idea of what happened to the o2 sensor is I cleaned off the valves with some cleaner and it smoked alot but cleared up and was running fine then started running badly and surging. I thought it was the #6 intake runner interference (vacuum leak) with the look alike header but I didn't have ANY interference and the intake went on fine. (I shaved alittle anyways because it was tight and I wanted an airgap)
I will top off the tank tomorrow and start recording the same way I have been. I am at 16.5mpg average over 19 tanks
Oh and ps, the gasket that cam with the header...not a fan. I reused the gasket on the engine, because I was in a time crunch and really didn't trust the gasket supplied. and the bolts that came with the manifold for the flange were too short.
Header, changed the tone, and its quiet!
99+ Intake changed the power band, and made it soooo much smoother
Fresh NGK o2 sensor...sucks it went bad...whatever, cant hurt.
my only idea of what happened to the o2 sensor is I cleaned off the valves with some cleaner and it smoked alot but cleared up and was running fine then started running badly and surging. I thought it was the #6 intake runner interference (vacuum leak) with the look alike header but I didn't have ANY interference and the intake went on fine. (I shaved alittle anyways because it was tight and I wanted an airgap)
I will top off the tank tomorrow and start recording the same way I have been. I am at 16.5mpg average over 19 tanks
Oh and ps, the gasket that cam with the header...not a fan. I reused the gasket on the engine, because I was in a time crunch and really didn't trust the gasket supplied. and the bolts that came with the manifold for the flange were too short.
Last edited by maybe2fast; 10-16-2012 at 07:50 PM.
10-16-2012, 09:47 PM
#21
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Year: 1999
Model: Cherokee
Engine: 4.0L Inline 6
Attachment 149885
From very full tank to this point on fuel meter 140 km or 87 mile all city driving this time !
From very full tank to this point on fuel meter 140 km or 87 mile all city driving this time !
10-16-2012, 09:48 PM
#22
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Year: 1988
Model: Cherokee
Engine: 4.0
Attachment 149885
From very full tank to this point on fuel meter 140 km or 87 mile all city driving this time !
From very full tank to this point on fuel meter 140 km or 87 mile all city driving this time !
10-17-2012, 08:41 AM
#23
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Year: 2001
Model: Cherokee
Engine: 4.0
Thanks ,
I think any XJ with NV3500 is great for MPG (I think 99-2000-2001 only comes with NV3500 )
change at 2000 RPM but the stupid arrow tell me to change at 1500 or some time 1300 I don't change gears at 1300 but this arrow is annoying
any way to program it to flash at 3000 RPM ? or shut it down wile in 4x4 ?
( in the desert driving it stay on because usually use 2nd and 3rd gear only )
This arrow is for best MPG
I think any XJ with NV3500 is great for MPG (I think 99-2000-2001 only comes with NV3500 )
change at 2000 RPM but the stupid arrow tell me to change at 1500 or some time 1300 I don't change gears at 1300 but this arrow is annoying
any way to program it to flash at 3000 RPM ? or shut it down wile in 4x4 ?
( in the desert driving it stay on because usually use 2nd and 3rd gear only )
This arrow is for best MPG
10-17-2012, 02:55 PM
#24
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Year: 2001
Model: Cherokee
Engine: 4.0
Update: around 70 miles today here is the meter
Most city driving around 20 miles high way
this time trying to get 350-370 miles per tank , by driving like nany
Most city driving around 20 miles high way
this time trying to get 350-370 miles per tank , by driving like nany
Last edited by weld3z; 10-17-2012 at 03:00 PM.
10-29-2012, 01:07 AM
#26
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Year: 2001
Model: Cherokee
Engine: 4.0
When i fill up it takes 71 L this well be 18.5 G so i think there is more 2-3 g left in the tank ,
Got around 355 mile most of it city driving between 40-60 mile
3 times high way driving 50-70 Miles
Result : great but i have un OEM cps i well install oem one soon .
10-29-2012, 11:24 AM
#27
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Year: 1988
Model: Cherokee
Engine: 4.0
okay, I have run through 2 full tanks of gas with the 99+ intake and look-a-like header, and new o2 sensor
avg 16.5 and 16.9 (really no change)
now the temp has dropped alot about 30* difference since last tanks and I believe winter fuel is in the tanks now. Still with the mods, I got a performance gain and smoother drive-ability but not MPG INCREASE. This confirms the claims that there is a power band change (feeling) and no MPG change.
I will say that these 2 tanks did involve some different driving (more city) than my usual route of 38miles one way with 30 being all expressway one way. I hope to get one of those weeks recorded but don't think it will be in the 20s since in the summer I have hit 17.9 on that route with a cracked manifold and log intake manifold.
My last experiement after a controlled tank of normal route is to plug the other IAT back in that is in the manifold for the winter and use the box mounted IAT for the warm months.
avg 16.5 and 16.9 (really no change)
now the temp has dropped alot about 30* difference since last tanks and I believe winter fuel is in the tanks now. Still with the mods, I got a performance gain and smoother drive-ability but not MPG INCREASE. This confirms the claims that there is a power band change (feeling) and no MPG change.
I will say that these 2 tanks did involve some different driving (more city) than my usual route of 38miles one way with 30 being all expressway one way. I hope to get one of those weeks recorded but don't think it will be in the 20s since in the summer I have hit 17.9 on that route with a cracked manifold and log intake manifold.
My last experiement after a controlled tank of normal route is to plug the other IAT back in that is in the manifold for the winter and use the box mounted IAT for the warm months.
11-05-2012, 07:53 AM
#29
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Year: 1988
Model: Cherokee
Engine: 4.0
last tank was 15.6! so its going down steadily as the weather is getting colder. I consistently do not use gas with advertised Ethanol (additional). I know with winter gas the mpgs are going to get worse, but other than the butt dyno these mods were not a "Green" solution.
11-07-2012, 09:10 AM
#30
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Year: 1988
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16.4 last tank, getting back to my normal weekly trips, no special sidetracks
but no special gains from 99+ Intake and Header
but no special gains from 99+ Intake and Header
Last edited by maybe2fast; 11-07-2012 at 09:16 AM.