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Peter
Dodge Dakota
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9/21/2006
22:06:53
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 Subject: gas mileage
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Message:
I have a 2001 Dakota 3.9. I have multiple mods on the truck inclueding a dynomax super turbo cat back, accel coil, taylor 8.2 wires, autolite extreme performance iridium plugs, TB spacer, 5.9L K&N 57-series intake, and a JET Stage-2 performance chip. I was getting 14-16mpg on regular gas, and i changed to premium after getting the Jet chip and now i'm only getting about 10-11mpg. I'm only 16yrs old and can't afford filling the tank every couple days.
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Peter
Dodge Dakota
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9/21/2006
23:09:54
| RE: gas mileage
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Message:
I want to know what kind of mileage I should or can be getting out of my dakota.
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adam
Dodge Dakota
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9/21/2006
23:38:52
| RE: gas mileage
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Message:
I drive all most all highway and i only get 11 - 13 mpg but thats caus im VERY hard on the gas pedal! 3.9 4x4 home ported and polished tb relocated temp censer and blocked egr tube. Im planing on dropping in a 5.9 mag
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Peter
Dodge Dakota
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9/22/2006
00:05:03
| RE: gas mileage
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Message:
Good idea with the 5.9. I don't understand how some people are gettin 20+mpg with thier 3.9
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zzark
*GenII*
9/22/2006
00:05:47
| RE: gas mileage
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Message:
I'm glad you started this post.
I just finished a trip to Texas, 1200 miles one way.
I got an average of 21.5
I was hoping for better, but that'll do.
zzark
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daddio
Dodge Dakota
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9/22/2006
09:32:40
| RE: gas mileage
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Message:
Peter, what yr/model truck do you have? when was the last time your truck had a tune-up? start there with quality parts. also, very overlooked, proper tire inflation and alignment.
i have an '00 QC 3.9 5spd w/3.55's and 235/75/15's. i have gotten a best of 23.5 highway with about 1,000#'s of people and luggage. i usually average around 18-20 combined.
only things i've done: v8 TB, el cheapo turbo muff, removed the clutch fan and the CPS mod. waiting to install my Crower 1.7:1 RR's.
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stevedak
Dodge Dakota
JOIN HERE
9/22/2006
09:34:01
| RE: gas mileage
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Message:
zzark...what mods have you done or have you always gotten that kind of milage?? I've done several mods (CPS, IAT relocate, V8 TB, TPS mod, K&N filter, ram air intake, bed cover), I also have a new cat convert and muffler but those are improvements, not mods. I've gain 1-2 mpg but can't get more than 17 mpg.
BTW...Amsoil guy, please don't reply to this post
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stevedak
Dodge Dakota
JOIN HERE
9/22/2006
09:37:03
| RE: gas mileage
IP: Logged
Message:
oh yeah...I also did the fuel sync mod. Mine is a 92 with an automatic.
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screwuphead
Dodge Dakota
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9/22/2006
13:29:00
| RE: gas mileage
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Message:
I get about 28mpg on adverage. I am mainly highway. I have the MSD 6A, MSD spark plug wires, MSD ss blaster, NGK V-power spark plugs, 180 theromstat from napa, and a V8 throttle body.
My might as well chruck that TB spacer, it could actually be hurting your gas milage! TB spacers only matter on the carb engines.
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zzark
*GenII*
9/22/2006
13:34:59
| RE: gas mileage
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Message:
stevedak,
Click on my dog pix to see my profile.
Very similar to your mods.
I'm now using the NGK v power plugs, not the pos E3.
zzark
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TuckerLdlow
Dodge Dakota
JOIN HERE
9/22/2006
15:11:45
| RE: gas mileage
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Message:
Mine is an '02 SLT with the 3.9. Mod's that I've done are a Fastman throttle body, synthetic oil, Harland Sharp 1.7's, a K&N drop-in, brass cap & rotor, APP3923's, with a Superchips w/performance settings and burning mid-grade. I haven't had the 1.7's in long enough to really get a good handle on what I'm getting, but right now the computer says I'm getting 18.7. The first third of the last tank was road driving, and I was getting 22.7. The rest has been in-town driving, and the low fuel lamp just came on at lunch. In-town used to be no better than 16-something, and sometimes 15-something - just depended on how heavy my foot was.
I DID note that when I went to mid-grade, my mileage jumped up. Been burning mid-grade for several months now. Where I get my gas, it's only 7 cents higher than 87 - most other places, it's at least a dime and sometimes higher. I usually pump in 15-17 gallons when I fill up, so it's costing me an extra buck and a quarter or so, but at the time that I switched, it gave me an extra couple MPG on the road and the truck runs better.
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ElmerFudd
GenII
9/22/2006
15:19:27
| RE: gas mileage
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Message:
I'm at 18 mpg and you can check my profile for the mods (165,000 miles) The one thing I haven't done is replace the O2 sensor. I'm the original owner so I need to look at 11 years of records to see if it was ever changed. Mechanic told me it was still good. That might mean it didn't show a bad O2 sensor code. But I'm still not getting anything near 20+.
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J and J Auto
GenII
9/22/2006
21:01:42
| RE: gas mileage
IP: Logged
Message:
first thing is unblock the EGR and you do not need
premium with the stage 2 chip
go 87 if no ping stick with it if ping go 89 oct
people do not understand gasoline
premium will egnite at a higher temp and burn
slower if you do not have the timing to run it
it will hurt perf and mileage
reg egnites at a lower temp and burns faster
It is very rare to get ping on a stock computer
with a stage 2 chip and the crank sensor mod I
have done this to many trucks and maybe 1 out
of 50 need to run 89 be sure your o2 sensor
is good NGK.com $45 new NTK NGK same as factory
mopar $108 your paying for the box with the
mopar name on it
Larry
J&J Auto
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