| From | Message |
J and J Auto
GenII
 
6/05/2008
23:42:09
|
 Subject: RE: O2 Sensors
IP: Logged
Message:
Bob
I got the exact oposite with the bosch +4 good
idle and off idle but reved like crap no power
at all
The champ truck plug which they started to instal
from the factory around 97 is actualy 1/2 a range
colder than the reg 12 champ when people
complained of ping this is the first thing they
would do at chrysler is instal the truck plug
and it worked to solve the problem in most trucks
If that did not work than they would give it a
death flash all this did was pull timing out
and make the trucks dogs and gas hogs
If your looking for a great plug for the money
the NGK Vpower run excellent at $2.40 ea and
make a noticeable dif in both performance and
gas mileage
With the price of gas these days most just use the
$0.99 walmart champ or autolite spending the
little extra for the NGK is a worthwhile
investment
Ijust got 22.5mpg on a 150 mile trip 50 degrees
and rain and half of that was on the free way at
70mph and this is a 4x4
I am running the E3 right now after E3 company
replaced the 3 that went bad and threw in a new
set of 6 and a set of 8 to test in my Lincoln
The MSD took out the resistors in them and the
company has now corected that problem they did
not know it exsisted until I sent them back and
told them about using the MSD system or they
would have never known the prob even exsisted
The guys at E3 really stand behind there product
I have about 5000 on them in my truck now and
about a 1000 in the lincoln in the big V8 I
gained .6mpg
The halo's we also still use they are now $9ea
and they do run great the E3 and halo are a very
close mathup in both performance and gas mileage
You can use a digital volt meter to check the o2
just tap the signal and ground the other lead
start cold should look like this
4.8 cold start
3.1 in 1 min
2.8 in 2 min
drop to 1.8 for a sec than begain the flip flop
with the top volts from 1 to .98 low side .3 to
.1 volt
this is a good sensor
when hot turn key on 4.8 start and it should
begain the flip flop within 30 secs or less if
it takes a min the sensor is getting lazy and
should be replaced soon
Also check the ASD volts with key on should read
same as batt volts with no more than a .2 drop
any more resistance than this it will begain to
throw your air/fuel ratio off
actualy you can check every sensor on the trucks
with a $30 digital voltmeter a scanner is nice
but again most cant always afford a $200 scan
tool the digital is the answer to that and a
haynes manual for 20 30 bucks with the wire
diagram and your all set to do your own testing
Larry
J&J Auto
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pete
Dodge Dakota
JOIN HERE
6/05/2008
23:51:34
| RE: O2 Sensors
IP: Logged
Message:
And to add Larry be sure to probe the right wires after reading manual not to short the sensor out and most of all save yourself a burn or to. And never would think your ASD relay could throw your Air/Fuel ratio off will scan tool verify this Larry ? didn't learn this one in school yrs ago..... or need a digital meter for this?
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Bob Lincoln
Dodge Dakota
JOIN HERE
6/06/2008
07:59:49
| RE: O2 Sensors
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Message:
A digital voltmeter works well for most things, but it isn't optimal for an O2 sensor. The O2 sensor can update many, many times per second, and the typical digital voltmeter can only update its display 1-2 times per second. So you are not seeing most of the data points and might assume it's lazy when it's in fact toggling faster than you can see it. Ideally, an oscilloscope is used to check it out. I just bought a handheld one for under $300, and it works great on most anything. I can also store screenshots to memory and dump them to a PC.
Thanks for the tip on the NGK plugs. I don't think any stores around me carry them, so I'll have to mail-order. I do find that occasionally my truck pings under only moderate load.
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daddio
Dodge Dakota
JOIN HERE
6/06/2008
11:08:07
| RE: O2 Sensors
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Message:
for those that can't afford a scope maybe an analog multi-meter could read the change of voltage from an O2 sensor.
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P2gee
Dodge Dakota
JOIN HERE
6/30/2008
17:17:48
| RE: O2 Sensors
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Message:
Analog voltmeter a big no no for checking O2's. You need a meter with 10meg ohm impedence so it will not load the circuit under test. Analog doesent meet this. Actually, labscope is best for checking o2's.
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Bob Lincoln
Dodge Dakota
JOIN HERE
6/30/2008
17:38:06
| RE: O2 Sensors
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Message:
O2 Sensors are good for 250,000 miles or more.
So you must be doing something wrong.
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Bob Lincoln
Dodge Dakota
JOIN HERE
7/01/2008
08:06:46
| RE: O2 Sensors
IP: Logged
Message:
Nice try, dickweed. Post under your own name. But at least you can spell my name, which some of the 3rd grade dropouts here can't.
An analog meter typically has 1 Megohm of resistance, should be good enough to check the O2 sensor.
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daddio
Dodge Dakota
JOIN HERE
7/01/2008
08:37:20
| RE: O2 Sensors
IP: Logged
Message:
Some manufacturers have a teset procedure for testing the O2 sensor out of the circuit. as in disconnected. granted it is not the best way to test but it is a good indication.
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Bob Lincoln
Dodge Dakota
JOIN HERE
7/01/2008
16:10:24
| RE: O2 Sensors
IP: Logged
Message:
"Nice try, dickweed. Post under your own name. But at least you can spell my name, which some of the 3rd grade dropouts here can't. " ???
LOL
I think you really need to grow up and find a name of your own to use!
Read my earlier response, I told you guys your throwing money away. O2 sensors last forever
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trev1
Dodge Dakota
JOIN HERE
7/01/2008
16:16:55
| RE: O2 Sensors
IP: Logged
Message:
Ok...... iv'e just about given up.. Who the he?? is who on this board. I can tell when J and J Auto is talking, but when daddio or Bob Lincoln is talking the spammer makes it real hard to figure it out.
Larry or daddio or Mr. Lincoln please restate the test on the o2 sensor.. Mine is a 92 v6 3.9
Thanks
Trevor in SWMO
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daddio
Dodge Dakota
JOIN HERE
7/01/2008
16:52:34
| RE: O2 Sensors
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Message:
trev1, i'll be honest with you. the only O2 sensor i've tested is on my son's '93 Saturn using the procedure from a Haynes repair manual that i have for it. i don't have a Haynes for my '00 dak so i can't give you that way if it would even have a procedure in it. i have looked through the '01 Dak FSM that i have access to and it does not have a testing procedure for the O2's.
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Bob Lincoln
Dodge Dakota
JOIN HERE
7/02/2008
08:36:53
| RE: O2 Sensors
IP: Logged
Message:
If you probe the sensor with an analog voltmeter, it should be between 0.1V and 0.9V, and should flutter back and forth around the center reading of 0.5V.
Since I don't pay to post here, anyone can, and is, posting under my name. If you don't want to put up with that crap, go to allpar.com, where you can join for free and have a secure login. They also don't allow spamming, insults, and all the associated s*&t that ruins this board.
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trev1
Dodge Dakota
JOIN HERE
7/02/2008
22:31:55
| RE: O2 Sensors
IP: Logged
Message:
Na.....thats not what I was saying.... I still get ALOT of info and sugestions from you guys. The crap that the spammers put up is just that. CRAP. Daddio, Mr. Lincoln, Larry and several others have all helped me and it is ALWAYS appreciated!!!
I do not pay to read or post here ither but still feel that the guys, and gals every now and then, are here because they want to be and have always been fast and gracious enough to help...why.. because they want to. Thats hard to find in this world.
Ive got a digital volt meter and will test my o2 this weekeng. Ill let you know what I find.
THANKS...
Trevor in SWMO
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RG
Dodge Dakota
JOIN HERE
7/03/2008
00:52:31
| RE: O2 Sensors
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Message:
Hey once again guys. Someone mentioned E3 plugs up there
earlier... i did purchase E3's from the shop and put them in a while
back. Don't waste your money. My truck ran like crap. I went back
2 days later and replaced them with copper champions. It ran SO
much better after that. 2002 Dak 3.9 For real don't waste your
cash. Luckily my manager let me return these for a full refund.
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ftheabus
Dodge Dakota
JOIN HERE
7/03/2008
08:28:03
| RE: O2 Sensors
IP: Logged
Message:
E3's are running fine in my '00. No complaints.
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yupp
Dodge Dakota
JOIN HERE
7/03/2008
22:21:15
| RE: O2 Sensors
IP: Logged
Message:
cant argue with that
when it comes to "sticking" and "probing"
Bob is the man!
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J and J Auto
GenII
7/04/2008
03:03:44
| RE: O2 Sensors
IP: Logged
Message:
Read the a/f ratio post
If going to better plugs makes your truck run
bad you have other problems
The occilscope is the best scanner next but a
volt meter will give you a very good idea if the
o2 is working for around $30
Using an occiliscope is the way I found out that
the bosch o2 sensors were the cause of the
problems on the trucks with lots of mods running
like crap
A stock truck runs so close to the stock comp
tables you can unplug the o2 and they will still
run fairly well
A moded truck you unplug the sensor and they will
run very crapy because they are running so far
off the base tables
If you look at the volt specs I wrote above you
could clearly see if the sensor is reading .4
or more on the low side and .9 to 1volt high side
high side .9 to 1 volt
low side .3 or les
If high side lower say .8 no good
low side .4 or higher no good
this can be caused by a bad splice in either the
power side or ground side that is why you need to
check ASD power in and ground side for any
resistance
And just so everyone knows the ASD voltage is the
same as batt volts but here is the problem it runs
thru the wire harnas that has many splices and can
have a voltage loss thru them.
The injectors are also feed batt volts tru the
ASD relay
It is not always the sensor being bad a scanner
may show it bad but in reality it could be the
power in or ground
Don't feel bad Bob people have found out
my pass word and put posts up under my name and
tried to pretend they were me for some reason
but just there wording you can tell
They try to sound like me but sometimes I get
very long winded
And why do you guys always pick on Bob he as far
as I am concerned has always been right on track
with his help and has never tried to BS anyone
I seen people check there o2,s they look bad so
they put a new one in and never look at it and
there truck still runs bad never thinking about
the power or ground that would make the sensor
look bad
sensors are recomended to be replaced 60 to 80,000
miles
I have seen them go bad in as little as 10,000
miles and have seen some last over 250,000 miles
Its just that most techs will not look closer to
find the real problem
Now look at Bob he got himself an occiliscope
now he will be able to watch the wave patterns of
all the sensors and really find problems that
most techs would never even think about and
you guys give him a hard time
He's in the 1% catigory of the techs the other
99.9% are lost somewere in the clouds factory
trained BSers is what they are
Larry
J&J Auto
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