Installed OFH but...

[ShibaYuki]

Originally Posted by D_Thissen

Yup, if they were damaged or cross threaded I think the only option is to replace them.

I'm going to conclude the problem is with a damage O2 sensor. Since all signs points to it. I'm gonna replace the O2 sensors and get new gaskets today. And get it reinstalled by another shop. Is there any shop I can go to that are reputable? I would've thought nextmod would be able to do it properly knowing their name. Not to put them down, they're a great shop and know their stuff but just made a mistake on mine.

[wparsons]

Originally Posted by ShibaYuki

Thanks, I'll check out the plugs right now. But I really doubt it was swapped by accident. I believe it's a leak at the o2 sensors. Or maybe it's damage. Does that mean I have to buy new sensors?

Have this checked out by someone before you start throwing parts at it... and take it somewhere that'll actually look and test things before buying sensors. A pair of O2's is not going to be cheap (going to guess about $500-$600 for the pair).

A cross threaded and/or leaking O2 shouldn't show voltage too low. Cat inefficiency or too lean/rich, sure. So make sure they verify the sensors are plugged into the right plugs, and that the harness connectors are in good shape. This could be as simple as a poor connection.

Worst case, if the sensor was damaged from cross threading, the bung on the header might be too damaged to simply chase the threads again, and it might need a new bung welded on.

[ShibaYuki]

Originally Posted by wparsons

Have this checked out by someone before you start throwing parts at it... and take it somewhere that'll actually look and test things before buying sensors. A pair of O2's is not going to be cheap (going to guess about $500-$600 for the pair).

A cross threaded and/or leaking O2 shouldn't show voltage too low. Cat inefficiency or too lean/rich, sure. So make sure they verify the sensors are plugged into the right plugs, and that the harness connectors are in good shape. This could be as simple as a poor connection.

Worst case, if the sensor was damaged from cross threading, the bung on the header might be too damaged to simply chase the threads again, and it might need a new bung welded on.

Oh God. I didn't know it was that expensive for a pair of O2 sensors. Should I take it back to nextmod and have them looked at it? Since they did do the install. And how do I go about getting a new bung for the openflashheaders? Jesus, this is giving me more problem than I thought.

[steve99]

Originally Posted by wparsons

Have this checked out by someone before you start throwing parts at it... and take it somewhere that'll actually look and test things before buying sensors. A pair of O2's is not going to be cheap (going to guess about $500-$600 for the pair).

A cross threaded and/or leaking O2 shouldn't show voltage too low. Cat inefficiency or too lean/rich, sure. So make sure they verify the sensors are plugged into the right plugs, and that the harness connectors are in good shape. This could be as simple as a poor connection.

Worst case, if the sensor was damaged from cross threading, the bung on the header might be too damaged to simply chase the threads again, and it might need a new bung welded on.

Generally the header bungs being stainless steel are way tougher than the 02 sensor threads , so its usually the o2 sensor that comes off worse for wear.

[ShibaYuki]

Originally Posted by steve99

Generally the header bungs being stainless steel are way tougher than the 02 sensor threads , so its usually the o2 sensor that comes off worse for wear.

I'll try to get it looked at by the shop tonight and hope to find the real problem. The shop installed the headers before they closed so I couldn't contact them right after I started getting closed. And they were also closed on Sunday. I was stuck driving around with codes and erasing it at the same time.
I only drive the car on weekends as well.

[steve99]

Originally Posted by ShibaYuki

I'm going to conclude the problem is with a damage O2 sensor. Since all signs points to it. I'm gonna replace the O2 sensors and get new gaskets today. And get it reinstalled by another shop. Is there any shop I can go to that are reputable? I would've thought nextmod would be able to do it properly knowing their name. Not to put them down, they're a great shop and know their stuff but just made a mistake on mine.

as the other guys said dont buy parts on spec, take it back to shop that did the job, o2 sensors not cheap and it might be just a leak or bad connection ect.

double check the shop did not install o2 spacers, a guy here in OZ got headers installed and the wombats at the shop installed an o2 spacer on the front primary o2 sensor.

you don't need o2 spacer or de-fouler at either of the sensors as your tuned

if you can with your oft log AFR (front 02 sensor), Commanded AFR (what ecu is asking for) and Wideband AFR (rear 02 sensor) also log rpm,ltft,engine load. do a couple of steady say 20% throttle runs up to say 4000rpm and post up logs

those guys at shop should have used NEW gaskets and cleaned up the threads on the header for o2 fittings, they definitely should not have forced 02 sensors into bungs on header.

If they used old gaskets it will leak for sure and if the 02 sensor not screwed in all the way then it wont be in exhaust flow and it will leak causing all sorts of issues.

[ShibaYuki]

I will go back today with new gaskets. So they can install that as well as check out the O2 sensors. I really hope it's just a bad connection.

[ShibaYuki]

Originally Posted by steve99

as the other guys said dont buy parts on spec, take it back to shop that did the job, o2 sensors not cheap and it might be just a leak or bad connection ect.

double check the shop did not install o2 spacers, a guy here in OZ got headers installed and the wombats at the shop installed an o2 spacer on the front primary o2 sensor.

you don't need o2 spacer or de-fouler at either of the sensors as your tuned

if you can with your oft log AFR (front 02 sensor), Commanded AFR (what ecu is asking for) and Wideband AFR (rear 02 sensor) also log rpm,ltft,engine load. do a couple of steady say 20% throttle runs up to say 4000rpm and post dup logs

those guys at shop should have used NEW gaskets and cleaned up the threads on the header for o2 fittings, they definitely should not have forced 02 sensors into bungs on header.

If they used old gaskets it will leak for sure and if the 02 sensor not screwed in all the way then it wont be in exhaust flow and it will leak causing all sorts of issues.

I just called them. And I asked if they can look at it and install my new gaskets. They won't be able to look at my car until Thursday. Meaning, no peace of mind.
Should I take it to a different shop or wait it out. Thursday is just pushing it since if the problem is not fixed then, I won't have a car for the weekend when I need it.

[drewbot]

Originally Posted by ShibaYuki

I just called them. And I asked if they can look at it and install my new gaskets. They won't be able to look at my car until Thursday. Meaning, no peace of mind.
Should I take it to a different shop?

Try Ivan at iGarage if you're near Markville mall

Sent from my A0001 using Tapatalk

[ShibaYuki]

Originally Posted by drewbot

Try Ivan at iGarage if you're near Markville mall

Sent from my A0001 using Tapatalk

Thanks for the recommendation, but I was looking for a shop around Brampton/Mississauga area. I wouldn't want to drive the car that far with these issues. =(

[drewbot]

See if Chris @ Touge Tuning is still there today

Sent from my A0001 using Tapatalk

[ShibaYuki]

Update:

I just came back from looking at the problem. It's a pretty big problem in my opinion.
So the rear o2 sensor is cross threaded. Need to replace it. The rear o2 sensor is real loose and you can take it off by hand without screwing it out.

These leads to all the codes. Running to lean, since there's an air leak at the o2 sensors and as well as a rear o2 sensor low voltage since the sensor is barely on the headers.

I just don't understand, if they knew the bung was stripped, they should've just tapped/chased it and screwed it. Not forced it. Now I have to buy a new rear o2 sensor and hope to God that it'll get fixed then. They just have to chase/tap the bung. I really don't know where to get the headers welded with new bungs.

[steve99]

Originally Posted by ShibaYuki

I just called them. And I asked if they can look at it and install my new gaskets. They won't be able to look at my car until Thursday. Meaning, no peace of mind.
Should I take it to a different shop or wait it out. Thursday is just pushing it since if the problem is not fixed then, I won't have a car for the weekend when I need it.

That a decision you will have to make.
if the original shop has stuffed o2 sensors they may pay for replacements, second shop will just charge you

[Bergen23]

I'd be getting nextmod to either fix everything with you watching, or get them to pay for all the replacement parts and repairs then take it to another shop.