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 Will a bad O2 Sensor cause a rough Idle????
#692885
02/03/06 02:27 PM
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Anonymous
Unregistered
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I have a rough idle on my 1993 4x4 with the 22re in it. It has about 125000 miles. I have had the o2 sensor code come up before but had it looked at and my mechanic said it seemed to be working fine. Can a bad O2 sensor cause a rough idle once truck has been warmed up?
Also where is the cheapest place to get a "factory" sensor from?
Thanks for any help
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 Re: Will a bad O2 Sensor cause a rough Idle????
#692886
02/03/06 04:09 PM
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Joined: Oct 2005
Posts: 392
Mudrunner
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An O2 sensor code doesn't always mean that the O2 sensor is bad.
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Re: Will a bad O2 Sensor cause a rough Idle????
[Re: 1986xtracab]
#692887
02/03/06 05:31 PM
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Anonymous
Unregistered
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Ya I wasn't sure of that....but I still have a rough idle.
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Re: Will a bad O2 Sensor cause a rough Idle????
#692888
02/03/06 06:35 PM
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Joined: Oct 2004
Posts: 1,270
Body Damage is Cool
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autozone can now order denso o2 sensors... stay away from bosch
91 pickup 5.29's US GEAR.35x 12.50 trxus m/t.5 speed swap- SOLD!
96 4Runna limited-toytec/OME lift,diff drop Nitto 285/75/16 Elocked=butter
07 FJ cruiser 3" DR coilovers 285/75/16 nitto TG. allpro sliders
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Re: Will a bad O2 Sensor cause a rough Idle????
[Re: 4Crawler]
#692890
02/03/06 08:39 PM
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Joined: Dec 2004
Posts: 42
Getting the Wheeling Fever
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I believe the O2 sensor is not in use during idle - so, no, it's something else.
94 4Runner, 5VZ-FE, A340H
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Re: Will a bad O2 Sensor cause a rough Idle????
[Re: 5VZ]
#692891
02/03/06 11:05 PM
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Joined: Jan 2006
Posts: 326
Mudrunner
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I believe the O2 sensor is not in use during idle - so, no, it's something else. Why would it not be in use during idle? I would think the ECU needs to know what the A/F ratio is no matter what the rpm. <img src="/forums/images/graemlins/confused.gif" alt="" />
'86 Toyo 4wd
'04 600RR
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Re: Will a bad O2 Sensor cause a rough Idle????
[Re: TimsToyo]
#692892
02/03/06 11:06 PM
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Joined: Jan 2000
Posts: 12,153
Web Wheeler
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My A/F gauge flicks back and forth at idle most of the time, although slower than normal. So I think the sensor is being read and the fuel mixture adjusted over time.
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Re: Will a bad O2 Sensor cause a rough Idle????
[Re: 4Crawler]
#692893
02/04/06 02:43 AM
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Anonymous
Unregistered
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OK I will try tapping the egr and see what it does. I might just go ahead and take it out and clean it with some carb cleaner since it has never been done.
Thanks guys you have been a big help
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Re: Will a bad O2 Sensor cause a rough Idle????
#692894
02/04/06 05:13 AM
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Joined: Dec 2005
Posts: 297
Mudrunner
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Got a vaccum tester? the FSM has a great set of egr and related parts that will diagnose the rough idle. You thermostat can end up causing that if the temperature sensor doesnt get hot it wont open the egr valve. Its easy to test though and eliminates the guessing.
Sold Truck: 89 DLX extra cab 4x4 22re Automatic/ New truck 97 T100 4x4 auto Sr5
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