I wouldn't think you would need one if it was catted, but I'm not sure. It sounds like it might help in this situation.
I am getting a CEL every couple days after installing my catless dp and EST exhaust, but I'm just resetting and dealing with the misfires while I wait on my tune.
So, since the weather has been cooler here in Canada, my stuck rich condition and check engine light have disappeared for the last 1500kms, me thinking high intake temps, sorry, are the culprit, stay tuned
My lower O2 sensor has been replaced twice, tried with spacer and no spacer and half a spacer, and still I get that CEL and code. I got the catted PhuzzDP. Need a custom tune, but ARD is the only one I know of close enough.
How did you route the wire? It's supposed to go up and travel under the windshield, then down past the turbo inlet along the fire wall. It looks long at first, but it may not be, unless you did all that and it's STILL long.
question in regards to the rear o2 delete, will it mess with emissions testing in any way? Like will the emissions people know if it was deleted? In washington state all they do is plug their computer system into my obd2 port and thats it.
The rear o2 sensors only function is to measure catalyst efficiency. It does this by measuring the amount of oxygen coming out of the cat. If the voltage is low and steady, the catalyst is doing its job by burning up HC's and CO. It does this by using most of the available oxygen in the exhaust stream. A CEL for the rear o2 or a catalyst efficiency code, generally has no effect on performance and tuning out the monitoring should also have no effect of performance. Whether a specific tune disables the monitoring function or just makes it "pass" the monitor, you probably need to ask the specifics of this to the tuner. I have seen on my V70R that using a large 90 rear o2 spacer would give me a fault for the front o2 sensor activity. Installing a 1 1/2" rear o2 spacer solved this.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
SwedeSpeed - Volvo Performance Forum
3.9M posts
157.6K members
Since 2000
A forum community dedicated to Volvo owners and enthusiasts. Come join the discussion about performance, builds, modifications, classifieds, troubleshooting, maintenance, new releases, and more!