Possible bad 02sensor
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Teching In
Joined: Jul 2020
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From: greenville south carolina
Possible bad 02sensor So I got caught in a bad rain storm and had to drive thru a deep puddle and the car started stuttering and skipping, fast forward two weeks later when I crank the car it runs fine for about 2 minutes then it starts skipping and after 5 to 7 minutes of it stuttering it stops and runs perfect for however long I drive it until I cut it off then it’s the same thing all over again anybody know what could possibly cause this my thought was maybe o2 sensor maybe when I first crank it it doesn’t try to run off o2 readings and so it doesn’t skip then it try’s to use them and starts skipping then maybe it realizes it’s bad and goes back to a preprogrammed mode so it starts running fine again. Anyone with any knowledge please help I was going to do my first cam install tomorrow but don’t want to until I get to the bottom of this.
So I got caught in a bad rain storm and had to drive thru a deep puddle and the car started stuttering and skipping, fast forward two weeks later when I crank the car it runs fine for about 2 minutes then it starts skipping and after 5 to 7 minutes of it stuttering it stops and runs perfect for however long I drive it until I cut it off then it’s the same thing all over again anybody know what could possibly cause this my thought was maybe o2 sensor maybe when I first crank it it doesn’t try to run off o2 readings and so it doesn’t skip then it try’s to use them and starts skipping then maybe it realizes it’s bad and goes back to a preprogrammed mode so it starts running fine again. Anyone with any knowledge please help I was going to do my first cam install tomorrow but don’t want to until I get to the bottom of this.
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Joined: Feb 2019
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Sounds like the 02 sensor(s) are not doing their proper switching during closed loop (cold). Then after its warmed up they can switch properly.
See if you have a code for 02 sensor Low Performance or Slow Response.
Not positive:
But I think 02 sensors don't come alive till after the coolant reaches 122*F. The MAF is handling everything. Then after warm up the 02 sensors take over and run the whole show, until you go WOT , then the MAF and 02 sensors work together during that period
Clean your MAF while you're at it.....
See if you have a code for 02 sensor Low Performance or Slow Response.
Not positive:
But I think 02 sensors don't come alive till after the coolant reaches 122*F. The MAF is handling everything. Then after warm up the 02 sensors take over and run the whole show, until you go WOT , then the MAF and 02 sensors work together during that period
Clean your MAF while you're at it.....
A bad O2 sensor would not explain both problems.
As noted, scanning for codes is the necessary first step. Beyond that, I'd be looking for loose wires and voltage problems that would be aggravated by damp conditions and cold engine bays.
As noted, scanning for codes is the necessary first step. Beyond that, I'd be looking for loose wires and voltage problems that would be aggravated by damp conditions and cold engine bays.
