O2 Sensor
#1
O2 Sensor
So my car (03 v6 manual) has been running at less than optimal lately (for anyone who doesn't remember or didn't see my previous posts: slightly rough idle, almost stalls occasionally, slight (but noticeable) loss of power, and a pretty considerable loss in gas mileage). The car has a bad O2 sensor, and offroad pipes to go with it. It has been suggested that the bad sensor is the cause of a lot of these problems, but I have gotten conflicting reports. I took it to a performance shop around here that my friend goes to asking the guy what I could do to get more out of my car, and brought up my concerns with the O2 sensors while I was there. He said something to the effect that they didn't really affect the engine that much in my car, and they were there basically just for environmental purposes. He also said something like "You could unplug the O2 sensors, bundle the wires, and plug the holes and you would only lose 1-2 mpg."
Now this seems strange to me because my dad's maxima had a dirty O2 sensor and was throwing a code, but because of the "rich" reading from the O2 sensor, it actually leaned the fuel mixture out which cut his power but he got better mileage out of it.
Now my plan here is to get the car tuned to "shut off" the O2 sensors so it wont consider readings from them anymore, and I found a place locally that claimed to do it for $299. Do you guys think that could be the source of my problems, and would it be worth it to get the tuning done? Other options as far as the tuning goes, like the possibility of an online company? Thoughts are greatly appreciated.
Now this seems strange to me because my dad's maxima had a dirty O2 sensor and was throwing a code, but because of the "rich" reading from the O2 sensor, it actually leaned the fuel mixture out which cut his power but he got better mileage out of it.
Now my plan here is to get the car tuned to "shut off" the O2 sensors so it wont consider readings from them anymore, and I found a place locally that claimed to do it for $299. Do you guys think that could be the source of my problems, and would it be worth it to get the tuning done? Other options as far as the tuning goes, like the possibility of an online company? Thoughts are greatly appreciated.
#2
So my car (03 v6 manual) has been running at less than optimal lately (for anyone who doesn't remember or didn't see my previous posts: slightly rough idle, almost stalls occasionally, slight (but noticeable) loss of power, and a pretty considerable loss in gas mileage). The car has a bad O2 sensor, and offroad pipes to go with it. It has been suggested that the bad sensor is the cause of a lot of these problems, but I have gotten conflicting reports. I took it to a performance shop around here that my friend goes to asking the guy what I could do to get more out of my car, and brought up my concerns with the O2 sensors while I was there. He said something to the effect that they didn't really affect the engine that much in my car, and they were there basically just for environmental purposes. He also said something like "You could unplug the O2 sensors, bundle the wires, and plug the holes and you would only lose 1-2 mpg."
Now this seems strange to me because my dad's maxima had a dirty O2 sensor and was throwing a code, but because of the "rich" reading from the O2 sensor, it actually leaned the fuel mixture out which cut his power but he got better mileage out of it.
Now my plan here is to get the car tuned to "shut off" the O2 sensors so it wont consider readings from them anymore, and I found a place locally that claimed to do it for $299. Do you guys think that could be the source of my problems, and would it be worth it to get the tuning done? Other options as far as the tuning goes, like the possibility of an online company? Thoughts are greatly appreciated.
Now this seems strange to me because my dad's maxima had a dirty O2 sensor and was throwing a code, but because of the "rich" reading from the O2 sensor, it actually leaned the fuel mixture out which cut his power but he got better mileage out of it.
Now my plan here is to get the car tuned to "shut off" the O2 sensors so it wont consider readings from them anymore, and I found a place locally that claimed to do it for $299. Do you guys think that could be the source of my problems, and would it be worth it to get the tuning done? Other options as far as the tuning goes, like the possibility of an online company? Thoughts are greatly appreciated.
#3
is there a check light on? most times a bad O2 sets the light off. have you check the vacuum lines for leaks? (that usually trips the light as well) but a vac leak will effect your idle as well. easy to check for vac leaks. also try cleaning out the IAC if you havent.
#4
He said something to the effect that they didn't really affect the engine that much in my car, and they were there basically just for environmental purposes. He also said something like "You could unplug the O2 sensors, bundle the wires, and plug the holes and you would only lose 1-2 mpg."
Now my plan here is to get the car tuned to "shut off" the O2 sensors so it wont consider readings from them anymore, and I found a place locally that claimed to do it for $299. Do you guys think that could be the source of my problems, and would it be worth it to get the tuning done? Other options as far as the tuning goes, like the possibility of an online company? Thoughts are greatly appreciated.
I wish people would stop keeping that myth alive. The rear O2 sensors most definitely effect your cars performance. Granted, not as much as the front O2 sensors, but they do have an effect in gas milage. The computer uses both the front & rear sensors for fuel trim calculations. It also uses the rear O2 sensors to determine if your catalytic converters are working properly.
#5
I talked to another shop and they said on a street car the o2 sensor it's only allowed to create a 5% variation, to prevent a bad sensor giving a super rich signal and then burning holes in the pistons or adversely messing up spark plugs because of a super lean signal, all because of a non-existent problem caused by a bad sensor.
also, I have off-road pipes so changing the sensor will only continue to result in a rich reading.
also, I have off-road pipes so changing the sensor will only continue to result in a rich reading.
#6
I talked to another shop and they said on a street car the o2 sensor it's only allowed to create a 5% variation, to prevent a bad sensor giving a super rich signal and then burning holes in the pistons or adversely messing up spark plugs because of a super lean signal, all because of a non-existent problem caused by a bad sensor.
I remember when I was reinstalling the motor in my wifey’s ’98 3.8L a few months ago, I wanted to fire it up at least once before bolting the exhaust to the headers to see what it sounded like. OMG it was loud and the car also ran like crap. I had to keep the RPM’s above 1.5k to keep it from stalling and even then the RPM’s weren’t stable. Once I put the exhaust on, it ran like a champ. Smooth as silk. Just sayin’...
Good luck...
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