Car Will Not Run With O2 Censor Unplugged!
05-06-2005, 03:10 AM
#1
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Car Will Not Run With O2 Censor Unplugged!
I unplugged the O2 sensor from the airbox today and suprising the car ran like crap. It stated up but when i went to drive it it sounded like crap and stalled when i shifted into second. It suxed. i was curious what would happen thats why i tryed it..
Has anybody tryed this? or found away to get around it?
My friend has a 04 cavey LS and he can unplug his o2 censor and the car runs fine. It is crazy!!
Has anybody tryed this? or found away to get around it?
My friend has a 04 cavey LS and he can unplug his o2 censor and the car runs fine. It is crazy!!
05-06-2005, 03:15 AM
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the O2 sensor in the airbox is used by the computer to determine how much fuel to mix with the incoming air. i doubt your buddies cavy ran good with that one disconnected. what is more likely is that he disconnected the one on the exhaust which is only there for emissions purposes.
05-06-2005, 03:27 AM
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one of the main reasons i did this, wasa becuase i tryed to put a cone air filter on where my air box was, then use some rubber tubeing to connect the filter to the existing tube. and make a hole for the O2 sensor to go in on top. But it did not work.
05-06-2005, 08:08 AM
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ahh your lucky then
i've tested it too cause i was messing with my air box and intake and blah blah
usually with out the O2 sensor (intake) the car will start and stall on its own or will not let u rev pass 3 rpm.
i've tested it too cause i was messing with my air box and intake and blah blah
usually with out the O2 sensor (intake) the car will start and stall on its own or will not let u rev pass 3 rpm.
05-06-2005, 03:18 PM
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The o2 sensor is in the exhaust, on the cat and near the collector. The sensor on the intake is a maf/map sensor. It measures airflow and sends a signal to the ecu, the ecu then will add fuel/remove fuel based on this reading. 
The reason your car was running like ____ is if the sensor is not in the pipe it detects no airflow, so thus it will pull back fuel and the end result is rough idle,
The reason your car was running like ____ is if the sensor is not in the pipe it detects no airflow, so thus it will pull back fuel and the end result is rough idle,
05-06-2005, 03:49 PM
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Originally Posted by slowpoke
The o2 sensor is in the exhaust, on the cat and near the collector. The sensor on the intake is a maf/map sensor. It measures airflow and sends a signal to the ecu, the ecu then will add fuel/remove fuel based on this reading.
The reason your car was running like poopie is if the sensor is not in the pipe it detects no airflow, so thus it will pull back fuel and the end result is rough idle,
The reason your car was running like poopie is if the sensor is not in the pipe it detects no airflow, so thus it will pull back fuel and the end result is rough idle,
Thanx i will try that. Before the sensor was right next to the cone air filters opening.
05-06-2005, 05:28 PM
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Yeah, what you unplugged is the Mass Air Flow sensor. The O2 sensor checks the amount of O2 left after combustion, and the ECU uses that information to calculate whether more fuel is necessary. At least I think that's how it works.
05-06-2005, 05:38 PM
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Originally Posted by dmikon
Yeah, what you unplugged is the Mass Air Flow sensor. The O2 sensor checks the amount of O2 left after combustion, and the ECU uses that information to calculate whether more fuel is necessary. At least I think that's how it works.