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jgreen3d
GenII
 
7/10/2007
17:02:06
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 Subject: MPG
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Message:
I was curious as to what other 318 are getting for gas milage. I seem to be getting extra poor MPG. Also wondering what can cause a drop in efficiency. Front O2 already changed. thanks, Jgreen3d
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CBG
Dodge Dakota
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7/11/2007
09:04:56
| RE: MPG
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Message:
hah...well, I think my 318 averages between 13-16 mpg
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jasonC
Dodge Dakota
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7/11/2007
16:15:06
| RE: MPG
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Message:
my 99 gets 18mpg.Or at least thats what the over head info center says.But it went up when I started using Royal Purple oil.
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daddio
Dodge Dakota
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7/11/2007
16:35:06
| RE: MPG
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Message:
a lot of things affect mileage. tire inflation and alignment, O2 sensor and driving habits would be my top 3. if you bought a cheapo O2 sensor it may not be reading as it should.
what kind of mileage are you getting?
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jgreen3d
GenII
7/11/2007
19:51:35
| RE: MPG
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Message:
not exactly sure what my milage is at the moment but I seem to go through an 1/8 of a tank every time I drive across town. I dont expect it to be great but it seems to have gotten worse in the last 3 weeks.
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daddio
Dodge Dakota
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7/11/2007
21:53:01
| RE: MPG
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Message:
that's no way to check your mileage. you need to fill up, run til you need fuel, fillup again and divide miles driven by gallons used. otherwise your just guessing.
about the only thing i can think of to cause a quick decrease in mileage is a bad O2 sensor. maybe a bad engine temp sensor too.
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TexasTodd
Dodge Dakota
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7/12/2007
05:17:42
| RE: MPG
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Message:
I heard of the Plenum gaskets leaking on those old Mamgnum engines, causes poorer MPG.
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jgreen3d
GenII
7/12/2007
07:15:58
| RE: MPG
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Message:
ive been looking for a plenum leak because on an idle wavering but the only way I know to check is to look through the throttle body. There is no oil collecting in the plenum.
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daddio
Dodge Dakota
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7/12/2007
08:50:21
| RE: MPG
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Message:
i found this on an old post:
Pull the hose to the PCV valve and plug the valve and the hose. Pull the hose from the valve cover to the air hat on the throttle body and check for vacuum at the hose. If any vacuum then probably a blown plenum gasket
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Legendracer97
Dodge Dakota
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7/18/2007
02:27:13
| RE: MPG
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Message:
A leaking intake gasket will show up as a low vacuum on a gauge. Just hook up a simple vacuum gauge to the vacuum port on the manifold and read its running results.
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Tyler_KY
Dodge Dakota
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7/27/2007
23:17:28
| RE: MPG
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Message:
I have an 02 CC 4x4 Auto 3.55 4.7L and get ~16/19 with modified intake.
My grandpa has 96 ram 5.2 5 spd 3.55 ext.cab with camper top and gets ~18/21!
needless to say...im envious
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01Motorsport
Dodge Dakota
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7/28/2007
17:00:12
| RE: MPG
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Message:
Tyler, your grandpa's manual tranny, 2wd, and to some degree, camper shell, help mpg.
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jgreen3d
GenII
7/30/2007
21:34:03
| RE: MPG
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Message:
I get about 9/12 mpg. tell me that doesnt suck!
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hollywood
Dodge Dakota
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8/01/2007
21:43:34
| RE: MPG
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Message:
mine gets abot 6 city 8-11 highway, my gas mileage is horrible, but then again i have plenty of mods, id hate to see how bad its gonna get when i build a new engine
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ewraven
Dodge Dakota
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8/02/2007
03:24:15
| RE: MPG
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Message:
19 highway/ ~15.8 city here
That is NOT with the overhead computer either. I calculate my MPG with every fillup and write it on the gas receipt with the miles on that tank.
1999 4x4 Club Cab, 5.2 liter engine, 5 speed manual, 3.55 gears and 31x10.50r15 tires.
Flowmaster muffler, Hughes stage 1 beer barrel intake and an open style air cleaner.
For those that use the overhead computer for your gas mileage, I reset it with every fillup. Like 20 percent of the time, it might be within .2 miles per gallon of the actual number, but most of the time it is way beyond that.
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Shoe
GenIII
8/02/2007
12:17:04
| RE: MPG
IP: Logged
Message:
I get about 20 mpg in the city... does not matter if I am getting on it or what. GOD I LOVE THESE MOTORS!!!! :)
Finally... a V8. '01 Dodge Dakota RC, 4.7, 5-speed, 3.92 LSD. = R/T Killer.
well at least a stock one
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DDR
Dodge Dakota
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12/10/2007
20:14:36
| RE: MPG
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Message:
An older way to check for a manifold leak is to squirt carb cleaner around the base/gasket. You will hear the engine speed change when the cleaner is sucked thru the break making the mixture richer. Be careful as that stuff is very volatile.
You also get a cleaner engine.
This works on hoses and fittings too.
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