So i installed my indivia 70mm test pipe last night and its the one with the cel/fix and everything went smoothly, no check engine lights or anything, this morning im driving and maybe 30 minutes into the drive the CEL comes on, any ideas on how this could happen or what might of happened?

 

check the code and see what it says. you could reset the ECU and see if it comes back but it's so easy to jump the connector to peep the code i'd just do that first.

 

it can still throw the code even with the extension for the o2. go to your local autoparts store and get spark plug non foulers. youll drill one through so the o2 can be threaded in and leave the other one undrilled and then attach that one as well, then thread them into the bung

 

yea most likely that will be the thing i do^

 

You have to reset the ECU when you install the test pipe. Just unplug the battery for a bit.


The spark plug non foulers are pretty similar in design to the O2 extension that you'd buy.
The only difference is that the non foulers have a smaller hole in the middle. I wouldn't bother drilling one of them out. Drilling out the non fouler kinda sucks to do.
I would just put a non fouler on the end of your extension. You can also close off the hole in the non fouler even further by just inserting a bolt/screw into the hole and securing it. That will block off the hole pretty much completely.


What year is the car? A lot of the times, the non fouler tricks don't work on 06+ cars.

 

its an ap1 , ill reset the ecu now just incase, i bought the foulers if that doesnt work ill get to it in the morning

 

There's no reason why the extension shouldn't work on the AP1. I think the CEL came on because you didn't reset the ECU.

The secondary O2 might still be sensing within it's parameters, but the disparity between the cat and the test pipe might be confusing the ECU. I doubt you'll have the CEL anymore after resetting the ECU.

 

i actually just reset the ecu and it went away

 

It will come back in a few hours, I did the same and mine went off and came back on after an hour or so drive.

Use a spark plug defouler, there is a how to on here somewhere.

 

yup yup... spark plug defouler with a 1/2" drill bit and your set... very easy to do and works like a charm...

 

yea you guys were right, came back on and i did the defouler last week and been good ever since

 

when i installed my 70mm TP i had the same problem. I called invidia and they sent me out an extender for the bung. Working fine ever since.

 

Now to put one of these damn things on my ITR and also the s2k, bahh laziness.