MR2 Roadster Owners Club

The Workshop => Maintenance, Problems & Troubleshooting => Topic started by: JerryL on May 3, 2020, 15:09

Title: Swapped manifold, o2 sensor lead short
Post by: JerryL on May 3, 2020, 15:09
Swapped manifold, O2 sensor lead short and touching head, is this problem? if so what have others done to resolve.

IMG_5183.jpg
Title: Re: Swapped manifold, o2 sensor lead short
Post by: shnazzle on May 3, 2020, 16:15
Get a longer lead o2 sensor. Or, if you have a duff o2 sensor, crimp the connector onto the end of the wire of this one. 

The post-cat o2 sensor is longer Denso DOX-0206 I believe.

Alternatively Denso DOX-0109 and crimp it to the desired length.
Title: Re: Swapped manifold, o2 sensor lead short
Post by: BahnStormer on May 14, 2020, 17:39
@Carolyn can confirm, but I'm pretty sure the post-cat one is the same spec and has a longer lead... they certainly look VERY similar!
Title: Re: Swapped manifold, o2 sensor lead short
Post by: Ardent on May 14, 2020, 17:55
Yep. same spec longer lead.
Title: Re: Swapped manifold, o2 sensor lead short
Post by: BahnStormer on May 14, 2020, 18:15
Quote from: Ardent on May 14, 2020, 17:55Yep. same spec longer lead.
and comes with clips.... and costs less!
Title: Re: Swapped manifold, o2 sensor lead short
Post by: shnazzle on May 14, 2020, 18:19
Universal (dox-0109) is still 50%cheaper
Title: Re: Swapped manifold, o2 sensor lead short
Post by: JerryL on May 14, 2020, 18:44
Thanks for all the info. I will investigate.
Title: Re: Swapped manifold, o2 sensor lead short
Post by: Call the midlife! on May 14, 2020, 22:28
I wouldn't actually advise doing it due to the temperamental nature of O2 sensors, they tend to die as soon as you remove them from their natural habitat, BUT...
If you're desperate you could always swap the post cat sensor for the manifold sensor to put you on.
The manifold sensor will just plug the hole in the cat and give you an EML but it doesn't really do anything other than tell the ECU if the cat is working anyway.
Again, it would only be a temporary measure until you sorted out a replacement.
Title: Re: Swapped manifold, o2 sensor lead short
Post by: shnazzle on May 14, 2020, 23:43
Quote from: Call the midlife! on May 14, 2020, 22:28I wouldn't actually advise doing it due to the temperamental nature of O2 sensors, they tend to die as soon as you remove them from their natural habitat, BUT...
If you're desperate you could always swap the post cat sensor for the manifold sensor to put you on.
The manifold sensor will just plug the hole in the cat and give you an EML but it doesn't really do anything other than tell the ECU if the cat is working anyway.
Again, it would only be a temporary measure until you sorted out a replacement.
After this long on the forum...have you learned nothing of my angry rants? :) :) 


But yes, if you must sacrifice one of the o2s, the post-cat affects fueling least
Title: Re: Swapped manifold, o2 sensor lead short
Post by: Ardent on May 15, 2020, 00:24
The beatings will continue, until morale improves. ;)
Title: Re: Swapped manifold, o2 sensor lead short
Post by: Call the midlife! on May 15, 2020, 08:39
Quote from: shnazzle on May 14, 2020, 23:43
Quote from: Call the midlife! on May 14, 2020, 22:28I wouldn't actually advise doing it due to the temperamental nature of O2 sensors, they tend to die as soon as you remove them from their natural habitat, BUT...
If you're desperate you could always swap the post cat sensor for the manifold sensor to put you on.
The manifold sensor will just plug the hole in the cat and give you an EML but it doesn't really do anything other than tell the ECU if the cat is working anyway.
Again, it would only be a temporary measure until you sorted out a replacement.
After this long on the forum...have you learned nothing of my angry rants? :) :)


But yes, if you must sacrifice one of the o2s, the post-cat affects fueling least
I know how much you like to rant, I'm just here to facilitate...😆

I DID start with the standard disclaimer...