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warren
Dodge Dakota
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2/03/2011
08:27:17
|
 Subject: 2001 dakota SLT v6 9mpg in city
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Message:
Hello, I have a 2001 Dakota v6 SLT, and
currently I get 9 mpg in the city. I
changed the pcv sensor, changed plugs
and wires wires, have a cold air intake,
and changed the tps. Tires are inflated
properly. Why am gettin such bad mpg's?
I have not changed O2 sensors yet, and
have not touched anything with the EGR
system
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Jeff Da Idiot
Dodge Dakota
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2/03/2011
13:01:08
|  RE: 2001 dakota SLT v6 9mpg in city
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Message:
Check for codes.
Turn ignition on and off and on and off and leave on.
Don't crank the car, just like if u were just listening to the
radio or if you are trying to roll ur windows down.
On the cel it should tell u a code, if there are no codes then
it's gonna display "p-done" I believe.
If no codes show up then You might have a o2 sensor that's
lazy. Don't get Bosch o2 sensors, they are crap. Get an NGK
o2 sensor.
You have 2, upstream and downstream.
And as far as I know, my 2000 slt 3.9 doesn't have an egr
valve.
But don't listen to me, I'm just an idiot :P
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warren
Dodge Dakota
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2/03/2011
15:22:16
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
Ok I did that and I got p-done. And what
if my o2 sensors are ok. Should I still
change them?
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Jeff Da Idiot
Dodge Dakota
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2/03/2011
15:27:59
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
Well if ya wanna gamble they might be lazy sensors.
But u should check the other sensors too, check for voltage
and see if they are all running right.
Map sensor
IAT sensor
Engine coolant temp sensor
IAC sensor(u should clean this one but just becareful u don't
move the spindle which is the metal tube under the cap, don't
twist it)
All these sensors can drop mileage.
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warren
Dodge Dakota
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2/03/2011
15:51:55
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
Now how exactly would u check for
voltage. I'm gonna have to use the thing
that looks like a screwdriver that
connects to the battery correct?
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daddio
Dodge Dakota
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2/03/2011
16:13:05
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
Warren, is your truck a regular cab, club or quad cab?
4wd or 2wd?
auto or manual trans?
Stock size tires and wheels?
I hope you changed the cap and rotor when you changed the plugs and wires. If not you've only done half of the tuneup. And no you do not have an EGR to worry about. You may only have 2 O2 sensors. It depends on the emissions package the truck came with. My '00 only has 2 O2 sensors. And the one before the catcon affects mileage the most.
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warren
Dodge Dakota
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2/03/2011
16:33:06
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
my truck is a 2001 Dodge dakota 4x4 Club Cab v6,
auto trans, stock 16in rims and stock Wrangler rt/s
tires. i did not do the cap and rotor when i did
plugs and wires. should i do that now? i put plugs
and wires in 1 year ago. if i do cap and rotor now
should i re use plugs??
and i no my truck has to be running rich, u can juss
smell it!
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Jeff Da Idiot
Dodge Dakota
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2/03/2011
18:40:35
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
U need a tester, rent it from auto zone.
And u should check ur fuel pressure. Tool or fuel pressure
can be rented at auto zone.
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warren
Dodge Dakota
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2/03/2011
18:46:43
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
Ok. Thanks a lot. I'll update tomorrow. I have a hannotech at
work. So it can do all that good stuff
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daddio
Dodge Dakota
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2/03/2011
20:20:48
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
If you can afford it, just do a complete tune up again. If not just change the cap and rotor with a good quality cap w/ brass contacts and a quality rotor. If it smells rich it could be a few things but most likely the precat O2 sensor. If you have access to a scanning tool that can read live data while the engine is running that would be the ticket.
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warren
Dodge Dakota
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2/03/2011
23:52:26
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
Ok. Thanks a lot. I'll update tomorrow. I have a hannotech at
work. So it can do all that good stuff
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warren
Dodge Dakota
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2/04/2011
00:07:34
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
alright, thanks u have been a big help. im going to
hook it up to the scanner tomorrow morning, and i
let ya no what it says
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daddio
Dodge Dakota
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2/04/2011
10:55:53
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
great, keep an eye on the O2 sensor readings and the map sensors. make sure everything is within specs.
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warren
Dodge Dakota
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2/04/2011
12:02:51
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
Alright so I have 4 o2 sensors. And when I scanned my truck
running at operating temp. The volts did not read over .9 the
whole time. I would have juss checked the specs for them.
But I can't seem to find them. Also my oil pressure at idle is
supposed to be 6 psi. At idle mine is 11 to 14 psi, could that
mean anything?
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daddio
Dodge Dakota
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2/04/2011
12:42:10
| RE: 2001 dakota SLT v6 9mpg in city
IP: Logged
Message:
That is minimum 6psi @ idle. 11-14 is good. Did the readings for the O2's fluctuate continously?
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warren
Dodge Dakota
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2/04/2011
13:54:50
| RE: 2001 dakota SLT v6 9mpg in city
IP: Logged
Message:
Yes but only between .42 to around .90
but never hit one
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warren
Dodge Dakota
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2/04/2011
15:23:52
| RE: 2001 dakota SLT v6 9mpg in city
IP: Logged
Message:
Actually the more I look at them. There going from .12 to .90
but drastically not gradually, All four of them
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daddio
Dodge Dakota
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2/04/2011
16:06:23
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
Not sure what they should be reading but I do know that they shoould keep changing. And if they are changing fast I would not think they are lazy. What about the MAP sensor. You really need to find a manual with the specs in it.
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warren
Dodge Dakota
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2/04/2011
16:23:45
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
Well it said that the map vacuum
is 18.1 in.VAC. I can only fond
specs for the map vacuum in
in.HG. My scanner didn't give it to
me in in.HG. and I couldn't find a
converter for it eiher. and the
volts for the map sensor are good
on that I found spec. U think I
should clean the map sensor, IAC,
IAT, and tps?
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Jeff Da Idiot
Dodge Dakota
JOIN HERE
2/04/2011
16:43:51
| RE: 2001 dakota SLT v6 9mpg in city
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Message:
Clean the iac.
And 4???? My truck has 2. Unless I never checked the other
two o2 sensors
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Jeff Da Idiot
Dodge Dakota
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2/04/2011
16:51:39
| RE: 2001 dakota SLT v6 9mpg in city
IP: Logged
Message:
Clean the iac.
And 4???? My truck has 2. Unless I never checked the other
two o2 sensors
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