Need immediate response!

[tigglebitties]

Alright so I posed a million times about my horrible gas mileage I get 13-16 maybe 1-19 if I'm lucky mpg. I had a guy run a test and he said that my 02 sensor was slow to respond I told him I should be getting 25-30mpg not 13-16 and he was like well I dunno if a 02 sensor would hurt the mileage that much. So! I mean maybe it can but if the 02 sensor isn't even fully broken just slow to respond what should I do? They said it would cost me $250 for part + 100 for install. I mean I am at the point I want to sell the damn car I've had it for a year and am sick of it. So is this the definite problem or am I going to throw $250 away on a hunch? It's at the shop so I need to get back to them soon.

 

[L2RTSiAWD]

If you want to pay 250 for an O2 sensor I"ll sell you one. You should pay no more 100 for the sensor. If you know people you can get it cheaper. I got my last O2 sensor for 75 bucks because I knew someone that worked at the dealership.


Also I suggest making your thread title more descriptive of the actual problem.

 

[a_scobel]

Alright so I posed a million times about my horrible gas mileage I get 13-16 maybe 1-19 if I'm lucky mpg. I had a guy run a test and he said that my 02 sensor was slow to respond I told him I should be getting 25-30mpg not 13-16 and he was like well I dunno if a 02 sensor would hurt the mileage that much. So! I mean maybe it can but if the 02 sensor isn't even fully broken just slow to respond what should I do? They said it would cost me $250 for part + 100 for install. I mean I am at the point I want to sell the damn car I've had it for a year and am sick of it. So is this the definite problem or am I going to throw $250 away on a hunch? It's at the shop so I need to get back to them soon.

Is this all in-city driving or highway?? On my GSX I usually got around 17-18 mpg city, maybe 22 on the highway.

Umm well what O2 sensor is bad?? You can buy the front one (in the O2 housing) for ~$55 bucks. The one after the cat, you can get for ~$65 (www.oxygensensors.com)

 

[tigglebitties]

If you want to pay 250 for an O2 sensor I"ll sell you one. You should pay no more 100 for the sensor. If you know people you can get it cheaper. I got my last O2 sensor for 75 bucks because I knew someone that worked at the dealership.

I got a friend at nappa, but is this even the issue? I mean it's just "slow" how hard is it to install this thing? worth the $100 to get installed?

 

[Syndicate13]

Alright so I posed a million times about my horrible gas mileage I get 13-16 maybe 1-19 if I'm lucky mpg. I had a guy run a test and he said that my 02 sensor was slow to respond I told him I should be getting 25-30mpg not 13-16 and he was like well I dunno if a 02 sensor would hurt the mileage that much. So! I mean maybe it can but if the 02 sensor isn't even fully broken just slow to respond what should I do? They said it would cost me $250 for part + 100 for install. I mean I am at the point I want to sell the damn car I've had it for a year and am sick of it. So is this the definite problem or am I going to throw $250 away on a hunch? It's at the shop so I need to get back to them soon.

If he told you 250 for an O2 sensor you need to never speak to him again. It sounds like you don't know a whole lot about cars in general. A brand new Mitsu O2 sensor should run you about 75 bucks, and that's retail. Get to know your parts guy and it may cost you around 50ish. It simply unplugs from it's harness and the new one plugs in. Bad gas mileage could be a number of things, driving habits, general upkeep of the car. Do a tuneup including plugs, wires, fuel filter, air filter or clean your current one and perform a boost leak test. A leak could cause a considerable decrease in gas mileage. I do agree that 13-16 is not good, I got 25 around town on my last tank, mods are in my profile.

 

[L2RTSiAWD]

I get 21-22mpg in the City with no A/C mods in profile.

100 bucks isn't to much for labor that's about 1.5 to 2 hours worth of labor.

 

[tigglebitties]

If he told you 250 for an O2 sensor you need to never speak to him again. It sounds like you don't know a whole lot about cars in general. A brand new Mitsu O2 sensor should run you about 75 bucks, and that's retail. Get to know your parts guy and it may cost you around 50ish. It simply unplugs from it's harness and the new one plugs in. Bad gas mileage could be a number of things, driving habits, general upkeep of the car. Do a tuneup including plugs, wires, fuel filter, air filter or clean your current one and perform a boost leak test. A leak could cause a considerable decrease in gas mileage. I do agree that 13-16 is not good, I got 25 around town on my last tank, mods are in my profile.

Not my friend whos charging me $250 the dealership shop
My buddy just called me back said he could get it to me for $53.89 so I will do that.

 

[L2RTSiAWD]

Bad gas mileage could be a number of things, driving habits, general upkeep of the car. Do a tuneup including plugs, wires, fuel filter, air filter or clean your current one and perform a boost leak test. A leak could cause a considerable decrease in gas mileage. .

Exactly.

 

[Splitpi]

Spend 15-20 on an O2 sensor removal socket at sears.

Jack the car up high enough to get under the car. Use Jack Stands to support the car for safety.

Crawl under the car to your rear O2 sensor (just past the cat).

Use the O2 socket and a ratchet wrench and remove the O2.

There is also an O2 sensor coming off the O2 housing by your turbo. You may need to get at it from under the car as well.

Reinstall and lower the car.

 

[urcnjoe]

Go to your local autoparts store and get the sensor and the special socket needed. It's like $8 for the socket and the sensor should be between $55-$75. Changing the sensor is very easy because it is right in the front of the motor. If you are showing a check engine light code have autozone check the code for free and make sure it is the sensor. Gas mileage in these cars is very tempermental based upon your right foot. Yes you can get 27mph, but only all highway driving and taking it pretty easy, especially in an awd car. Don't pay that much for a shop to do that simple job, they are trying to rip you off imo.

 

[tigglebitties]

So.. This makes things more confusing so I need to order 2 02 sensors now? Front and the back?


tuneup including plugs, wires, fuel filter, air filter or clean your current one and perform a boost leak test. A leak could cause a considerable decrease in gas mileage.

Had these issues when I got it so I changed the Air filter, and plugs, didn't help. The guy who owned the car before also installed these red wires? apparently they are supposed to be good. Anyways those the wires you are talking about or totally different ones? What are signs of a boost leak and how could I check if I have one cause I doubt they checked?

Also what would cause this I drive down highway I have to slow down immediately then after I slow down my car revs high then back down for no apparent reason?

 

[keymaster]

The rear O2 is only there to monitor cat function, it wouldn't affect your gas mileage. Here's a link to build a boost leak tester: http://www.vfaq.com/mods/ICtester.html.

 

[kenamond]

You can probably borrow an O2 sensor socket. It's a normal deep well socket with a slot cut in the side so that the wires can go out the side of the socket as you take it off or put it back on (the wires are built onto the sensor, so you have to be able to remove it with the wires in place).

You'll need some anti-seize compound and a torque wrench, too, when you install the new sensor.

The front O2 sensor comes off without having to take anything else off of the car. You'd be best off to do it from under the car. Jack up the driver's side front corner and hold it up with a jackstand.

If it's hard to get out, nail it with some PB blaster or other penetrating oil and let it soak for 15 minutes, then try again. You can use a breaker bar to break it loose, and if you don't have one, the quick-release seat post of a modern bicycle slipped over your rachet handle works wonders!!

The front O2 sensor plug is on the passenger side of the motor, and the front O2 sensor is on the driver's side just above the start of the exhaust pipe, threaded into the O2 housing. The wire that runs on top of your heat shield that covers your exhaust manifold is the front O2 sensor wire, so you can just follow it to either end to find the plug and the actual sensor. The rear sensor wire runs through a hole in your floorboard. Don't know anything else about it, but others surely do.

When you replace the sensor, twist the wires 5 or so full turns so that when you thread it into the O2 housing, it unwinds the wires.

If you don't have problems getting the old one out, it takes as much time as jacking up a car, taking a bolt (the old sensor) out, unplugging one plug, plugging in a new one, smearing anti-seize on the threads, screwing in a bolt (the new sensor), torqueing it to spec, re-routing the wire through the three clips on the heat shield, and lowering the car off the jackstand. This is not a 2 hour job for a mechanic who has access to a lift and all of these tools!!

 

[tigglebitties]

Alright thanks guys for the fast response saves me some cash.

Their wheel alignment guy wasn't in so can't get that done till the weekend but oh well.

How do I install a fuel filter or is that thing toxic and I should get someone else to do it?

Also what would cause this: I drive down highway I have to slow down immediately then after I slow down my car revs real high then back down for no apparent reason?

 

[Syndicate13]

Alright thanks guys for the fast response saves me some cash.

Their wheel alignment guy wasn't in so can't get that done till the weekend but oh well.

How do I install a fuel filter or is that thing toxic and I should get someone else to do it?

Also what would cause this: I drive down highway I have to slow down immediately then after I slow down my car revs real high then back down for no apparent reason?

The fuel filter is located on the firewall underneath the battery. Remove the battery and tray and you can get to it fairly easily.

 

[tigglebitties]

For a tuneup where would you guys go Mitstu or Dodge dealership? what do they actually replace

 

[4BangR-x]

ok a tune up is way to easy to not do on your own, just do it yourself.

 

[AWDtsi1995]

Tune up can be a bunch of things. Normaly its spark plugs, wires, fuel filter, belts, oil, air filter and anything else that needs replacing.

Edit: You can do a lot of this yourself. I would say the most difficult would be the fuel filter but its not that bad.

 

[MyBeatGSX]

If you're one of the unlucky people that have sealing issues with the banjo bolt on the fuel filter (and that seems to be quite a few people including me) it is a royal PITA. If you had asked me about it when I was in the middle of it, I would have beaten you to death with a 1/2" ratchet for just talking to me and then told your lifeless corpse I wish I brought it to the dealer. I had to crank it on and off 20+ times (which requires lots of muscle and the risk of breaking the mounting bracket or bottom hard line) and went through 10 sets of crush washes before it stopped leaking.

Aside from that, the rest of the tune up is easy.

 

[4BangR-x]

If you're one of the unlucky people that have sealing issues with the banjo bolt on the fuel filter (and that seems to be quite a few people including me) it is a royal PITA. If you had asked me about it when I was in the middle of it, I would have beaten you to death with a 1/2" ratchet for just talking to me and then told your lifeless corpse I wish I brought it to the dealer. Aside from that, the rest of the tune up is easy.

 

[sadsm]

If you're one of the unlucky people that have sealing issues with the banjo bolt on the fuel filter (and that seems to be quite a few people including me) it is a royal PITA. If you had asked me about it when I was in the middle of it, I would have beaten you to death with a 1/2" ratchet for just talking to me and then told your lifeless corpse I wish I brought it to the dealer. I had to crank it on and off 20+ times (which requires lots of muscle and the risk of breaking the mounting bracket or bottom hard line) and went through 10 sets of crush washes before it stopped leaking.

Aside from that, the rest of the tune up is easy.

I think the fuel filter IMO is harder than changing the clutch. I guess I had the same problem you had. Other than that, everything else is easy. Good luck, and don't be afraid to ask any questions, that what we are here for.

 

[tigglebitties]

So nobody has any idea what the High revving for no reason would be from? I was looking through some documents and the guy who had the car before me had it checked out and something replaced obviously it didn't do the job.

And yeah I don't know a ton about cars but I've been learning. It sucks my friends who teach me are back in MN where all my tools and stands are. I'm going to school in Winnipeg so if I #### up I don't have them to bail me out. I also miss the tuner shop I go to they diagnose my shit for free the ass clown mechanic here decided to charge me $80. Can the Mitsu dealership check for boost leaks and if so what can be done about it?