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o2 sensors


Discussing o2 sensors in the V6 Mustangs Forum. in my quest to fix my terribe gas mileage i have changed... spark plugs fuel ...

       

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Old April 16th, 2008, 02:07 AM   #1
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o2 sensors

in my quest to fix my terribe gas mileage i have changed...

spark plugs
fuel filter
air filter
tire pressue
cleaned iac
cleaned maf
seafoam in the gas

after all this, im still getting unacceptable mileage compared to what i was getting a little less than a month ago. my driving style and habits are the same a they always where. im thinking my next step to tackle the problem would be my o2 sensors...

however, $200 for all four is not in my budget, i cant do it. im on a high school student salary ftl. i can squeeze $100 for the first two in front of the cats. Is this a good idea. would new plug wires be a good idea first and see if that helps?

56,2xx miles, 13 mpg, no cel, no codes...
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Old April 16th, 2008, 02:17 AM   #2
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It is more than likely your o2s. I was having trouble with mine and it was dumping to much fuel into the engine and I was getting about 9 miles to the gallon.
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Old April 16th, 2008, 02:18 AM   #3
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13MPG OMFG that is bad! Yes you should replace your o2 sensors ASAP. Do them one at a time if you have to, but with gas prices what they are now, it will save you money in the long run.
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Old April 16th, 2008, 02:21 AM   #4
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Originally Posted by jdansby1 View Post
It is more than likely your o2s. I was having trouble with mine and it was dumping to much fuel into the engine and I was getting about 9 miles to the gallon.
v6? i know mine is actually a little worse, but i havent calculated it exactly, but lets just say ive gone 40 miles on a 1/4 tank. so o2's is all u did and u were back in shape?
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Old April 16th, 2008, 02:22 AM   #5
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You can give them a test if you have a volt meter and know a little about cars. I dont think new plug wires will really help much here either.
 
Old April 16th, 2008, 02:25 AM   #6
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Originally Posted by Assassin_Dan View Post
You can give them a test if you have a volt meter and know a little about cars. I dont think new plug wires will really help much here either.
i got a meter, how do i do this?
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Old April 16th, 2008, 02:28 AM   #7
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i might be doing the same thing
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Old April 16th, 2008, 02:35 AM   #8
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It is more than likely the o2 sensors. BTW...I don't know what your future plans are, but if you plan on any kind of big power you should get a wideband o2 sensor. Just figured that I'd bring that up since you're gonna be replacing all your sensors anyway.
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Old April 16th, 2008, 02:37 AM   #9
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Originally Posted by blazor View Post
v6? i know mine is actually a little worse, but i havent calculated it exactly, but lets just say ive gone 40 miles on a 1/4 tank. so o2's is all u did and u were back in shape?
Yep, '01 v6. You should be getting closer to about 300 miles on a full tank. Im no where near that. I need to clean out filters and such. But the o2 sensors made a HUGE difference.
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Old April 16th, 2008, 02:39 AM   #10
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Originally Posted by MWWarlord View Post
It is more than likely the o2 sensors. BTW...I don't know what your future plans are, but if you plan on any kind of big power you should get a wideband o2 sensor. Just figured that I'd bring that up since you're gonna be replacing all your sensors anyway.
im staying n/a with basic bolt ons, nothing major. if and when i can afford a nice poweradder, then ill be able to afford a wideband set up
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Old April 16th, 2008, 02:41 AM   #11
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K just thought I'd bring it up.
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Old April 16th, 2008, 02:43 AM   #12
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Originally Posted by jdansby1 View Post
Yep, '01 v6. You should be getting closer to about 300 miles on a full tank. Im no where near that. I need to clean out filters and such. But the o2 sensors made a HUGE difference.
i use to get like 270-300 (depending on how big of a dick i drove like on that tank)... then over a couple days it just went to shit. well that is all the convincing i need, i just want to get back to a decent sustainable mileage. $40 a week on gas is not working so well for my checking account.
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Old April 16th, 2008, 02:44 AM   #13
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Originally Posted by MWWarlord View Post
K just thought I'd bring it up.
haha you had good intentions only my friend
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Old April 16th, 2008, 02:45 AM   #14
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hey jdansby1, did u do all 4 or just the first 2?
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Old April 16th, 2008, 09:42 AM   #15
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Originally Posted by Assassin_Dan View Post
You can give them a test if you have a volt meter and know a little about cars. I dont think new plug wires will really help much here either.
well if the wires are bad, then the spark plugs arent going to be doing their job efficiently.
 
Old April 16th, 2008, 05:04 PM   #16
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hmm, i still think its most likely the o2 sensors cuz the wires look ok still
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Old April 16th, 2008, 05:05 PM   #17
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if your going to replace o2sensors
change the ones before the cats
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Old April 16th, 2008, 05:11 PM   #18
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Originally Posted by itschristorres8 View Post
if your going to replace o2sensors
change the ones before the cats
okay, sounds good. tomorrow, ill see what happens.
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Old April 16th, 2008, 06:58 PM   #19
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Hey, one thing though. When one of mine was out, it had the CEL on. So I'd make sure before I go off spending $50+ for them...
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Old April 16th, 2008, 09:11 PM   #20
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ive heard that a bad 02 will not always trigger a cel
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