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10 Mpg Wtf!!!!!!

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Old 02-17-2007, 11:49 AM
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Default 10 Mpg Wtf!!!!!!

Im getting about 10 MPG and it pissing me of with gas being over 3 bucks a Gallon now, I am throwing SES codes last time I got it read it was the Driver side 02 sencor. Could this be my fuel problem? Can 02 sensor really mess up my MPG? im gonna switch them out with newm ones 80 bucks a pop! and try changing my plugs as well.. Seeing how last time i did that was in may of 05... Anyone got some input?
Old 02-17-2007, 11:54 AM
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prolly have to replace your o2 sensor,yes they can mess things up.
Old 02-17-2007, 06:14 PM
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replaced em both.. hopefully its good....
Old 02-17-2007, 06:28 PM
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damn 10MPG and I dont see any major mods listed.

yeah the O2's can screw up your mileage.
Old 02-17-2007, 08:21 PM
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Gas is over $3 a gallon in California?
Old 02-17-2007, 08:33 PM
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Originally Posted by 01ls1lover
Im getting about 10 MPG and it pissing me of with gas being over 3 bucks a Gallon now, I am throwing SES codes last time I got it read it was the Driver side 02 sencor. Could this be my fuel problem? Can 02 sensor really mess up my MPG? im gonna switch them out with newm ones 80 bucks a pop! and try changing my plugs as well.. Seeing how last time i did that was in may of 05... Anyone got some input?
when you have a problem like this..You eliminate the simple possilities, first....maybe its your lead foot..that has been a problem for quite a few people..do you have this problem?..if not maybe your tires are low on PSI..
Old 02-18-2007, 12:00 AM
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Not my foot, My g/f is driving it. She drives fine. Been throwing this stupid code for a while now my MPG is sucking.. And the cars exhaust smells of pure fuel. I changed sensors to brand new, Deleted the code and it came back on. I think maybe a wire is pinched because the computer is gettgin no response from my sensor. Or possibly i could be a problem with my 02 sims.. Tires are fine. Filter is cleaned, Iritating is what it is.. Try again tomorrow. But hoping its a pinched wire.
Old 02-18-2007, 12:11 AM
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no excuse for 10mpg unless your running at constant WOT. do you have a buddy with some logging software? You may be running way rich from the headers and other mods. But like other said fix the small stuff first and then move from there.
Old 02-18-2007, 12:31 AM
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yea there is a problem, even if you beat on it youll get better then 10mpg, low tire pressure wont affect it more then at MOST a few miles to the gallon
Old 02-18-2007, 12:36 AM
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You might be running in limp mode, which will kill mileage. You need to have a scanner hooked up to see what exactly is goin on too. It is possible that for some reason you are seeing lots of knock retard. You could also have a fueling/ignition issue too.
Old 02-18-2007, 12:18 PM
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Im gonna go to autozone this morning and rent a scanner and go from there. I need to get this thing fixed. I have smog soon. And tired of the shittie gas mileage with gas prices up here.. yesterday was $3.04 a Gallon.. Probablly still going up.
Old 02-18-2007, 01:01 PM
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Bad O2's can definitely cause bad gas mileage. When the pcm records a problem with an O2 sensor, it sends the car into safe mode, richening up the A/F to ensure that the car never goes lean. I would also look at the maf, IAC, IAT, and definitely get some scanning done. First things first though, change the O2's.
Old 02-18-2007, 02:06 PM
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I changed the 02's last night deleted the codes it was throwing and it starting throwing more codes so im gonna go get the scan tool again and start from there. But this has been happening for a while, Eveer since i got my trany replaced the SES light came off and on now its stuck on and the MPG sucks ***. I think maybe they pinched a wire or something cam loose along there with the 02 sensor but im gonna go get the scanner today and start from there agian see what the deal is.. im about to get everything going just been a busy morning.
Old 02-18-2007, 09:53 PM
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Ok, Front 02s are good now its throwing codes for bank one sensor 2...
Old 02-18-2007, 10:14 PM
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When your front sensors were out, they fed too much fuel into the engine, which led to your rears burning...

No offense, but what the heck are you doing driving around for "awhile" when you're car is throwing codes? When your block goes "crack" or "boom" prematurely, please remember this, as a code means that the ecm has read an error, and is trying to correct for it; in the case of O2 sensors, it means you'll be running extremely rich, and eventually when the rear sensors read the flooded conditions, you'll get momentary periods of lean conditions bad enough to cause huge misfires.

When a light comes on, get it checked right away; it'll save you a big headache in the end!
Old 02-18-2007, 10:14 PM
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Originally Posted by 01ls1lover
Ok, Front 02s are good now its throwing codes for bank one sensor 2...
Your cats may be going bad which will affect mileage or the rear O2's are going bad which has no affect on anything except that damn SES light.
Old 02-18-2007, 10:17 PM
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Originally Posted by DRSITES
, it means you'll be running extremely rich, and eventually when the rear sensors read the flooded conditions, you'll get momentary periods of lean conditions bad enough to cause huge misfires.
Another advice giver that doesnt even know what hes talking about

Rear O2's do nothing except monitor Catalytic converter efficency, they have no affect on fueling or anything else for that matter.
Old 02-19-2007, 10:15 AM
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Originally Posted by DRSITES
When your front sensors were out, they fed too much fuel into the engine, which led to your rears burning...

No offense, but what the heck are you doing driving around for "awhile" when you're car is throwing codes? When your block goes "crack" or "boom" prematurely, please remember this, as a code means that the ecm has read an error, and is trying to correct for it; in the case of O2 sensors, it means you'll be running extremely rich, and eventually when the rear sensors read the flooded conditions, you'll get momentary periods of lean conditions bad enough to cause huge misfires.

When a light comes on, get it checked right away; it'll save you a big headache in the end!
The light was coming off then on, I scanned it right away it was an 02 sensor. I fixed it when i got the cash. And for the rears... I have Sims..
Old 02-19-2007, 10:16 AM
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Originally Posted by brad8266
Another advice giver that doesnt even know what hes talking about

Rear O2's do nothing except monitor Catalytic converter efficency, they have no affect on fueling or anything else for that matter.
You have any idea why the sims are throing the code now? Think my sims went bad?
Old 02-19-2007, 10:51 AM
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Originally Posted by 01ls1lover
Im getting about 10 MPG and it pissing me of with gas being over 3 bucks a Gallon now, I am throwing SES codes last time I got it read it was the Driver side 02 sencor. Could this be my fuel problem? Can 02 sensor really mess up my MPG? im gonna switch them out with newm ones 80 bucks a pop! and try changing my plugs as well.. Seeing how last time i did that was in may of 05... Anyone got some input?
Make sure your ECT and IAT sensors and connections are good.



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