Could a bad oxygen sensor cause a rough idle
08-21-2006, 09:40 PM
#1
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Car: '89 GTA 9,000 MILES
Engine: 350
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
Could a bad oxygen sensor cause a rough idle
after going into closed loop. 89 TPI.
Car idles normally until it warms up enough to go into closed loop. I searched and found little info. Thx
Bill E.
Car idles normally until it warms up enough to go into closed loop. I searched and found little info. Thx
Bill E.
08-22-2006, 08:02 AM
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Car: 84-92 firebirds
Engine: 2.8/3.1
Transmission: auto
The short answer to your question is yes. If the O2 is bad and reading lean all the time the ECM will richen the A/F mixture, causing a rich condition, in turn causing a rough idle. If the sensor has'nt been replaced in a while, go ahead and replace it.
08-22-2006, 12:36 PM
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Car: 84-92 firebirds
Engine: 2.8/3.1
Transmission: auto
If the sensor is still putting out a mV signal a code won't be thrown for the O2 sensor. I'm not sure what triggers the ECM to throw a lean or rich code though.
08-22-2006, 11:16 PM
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Car: 2005 BMW 545i
Engine: 4.4L N62B44
Transmission: 6spd auto
Axle/Gears: Rotating
if you don't mind just out of curiousity is there a chance to disconnect the O2 while your car is warming up see if it runs ok afterwords.
I'm fairly sure it would still run ok but honestly I'm not 100%
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