Loud sucking sound bad miss then dies
Legend
Joined: Mar 2011
Posts: 8,914
Likes: 4
From: Fredericksburg, Virginia
And a good working non oil fouled O2 Sensor at that!
Thread Starter
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Amateur
Joined: May 2012
Posts: 37
Likes: 0
think i am just gonna keep running with them both unplugged runs alot better hope it wont do any damage
there is no way to tell which is post and pre cat because someone put duel exhaust on with no cats at all does anyone offer a o2 sensor to work in this application
i havnt had any of the problems i had with them plugged in
and thanks again for the help this is a awsome site
there is no way to tell which is post and pre cat because someone put duel exhaust on with no cats at all does anyone offer a o2 sensor to work in this application
i havnt had any of the problems i had with them plugged in
and thanks again for the help this is a awsome site
Legend
Joined: Jul 2011
Posts: 8,259
Likes: 4
From: Austin, TX
WTF?
think i am just gonna keep running with them both unplugged runs alot better hope it wont do any damage
there is no way to tell which is post and pre cat because someone put duel exhaust on with no cats at all does anyone offer a o2 sensor to work in this application
i havnt had any of the problems i had with them plugged in
and thanks again for the help this is a awsome site
there is no way to tell which is post and pre cat because someone put duel exhaust on with no cats at all does anyone offer a o2 sensor to work in this application
i havnt had any of the problems i had with them plugged in
and thanks again for the help this is a awsome site
It will work better to replace them.
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Amateur
Joined: May 2012
Posts: 37
Likes: 0
ok but my next duestion is will it matter since there is one in each side almost in the exact same location dont mean to sound stupid here but you all know what i mean when i say dont wanna buy two if one will fix it
you would think there would be sensors out there for duels but i will try the unplugging trick and see if i can get the correct one thanks again
you would think there would be sensors out there for duels but i will try the unplugging trick and see if i can get the correct one thanks again
Legend
Joined: Jul 2011
Posts: 8,259
Likes: 4
From: Austin, TX
ok but my next duestion is will it matter since there is one in each side almost in the exact same location dont mean to sound stupid here but you all know what i mean when i say dont wanna buy two if one will fix it
you would think there would be sensors out there for duels but i will try the unplugging trick and see if i can get the correct one thanks again
you would think there would be sensors out there for duels but i will try the unplugging trick and see if i can get the correct one thanks again
The original design is for one (pre cat) to be upstream of cat. THis one sends infor to PCM to determine a/f mixture. The other one is to monitor whether cat is functioning properly. There is no way for any of us to know whichone is which, but already told you how to determine.
If the downstream O2 reading is too close to updtream reading, it will set a code. Possibly the anti fouler thing may correct that.
First thing - find out which one is the pre cat sensor on your truck.
Registered User
Joined: Jul 2020
Posts: 11
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I have a 1997 dodge ram 2500 4x4 360 that runs fine when cold after it warms up it gets a loud sucking sound then dies. Start it back up runs fine fo a couple mins then does it again .no trouble codes. We had a cold snap here in ohio for several days and it ran fine and now that it warmimg up it does this runs fine as long as its on the floor but misses and pops through throttle body when trying to maintain a stedy speed
Any ideas
Any ideas
I had the same problem. After reading some other forums I found that unplugging my upstream o2 sensor stopped my truck from doing this. Truck gets bad gas mileage with upplugged and gives a check engine light but at least no crazy surge of air sucking and engine about to die. Waiting on upstream o2 sensor now. I also read to go with NTK sensor because it’s OEM. Hope this helps someone.
