Help with high-flow cats, no CEL

Q

QrX70

Member
Car
QX70
Name
Phong
Hi guys - so i have the ISR high flow cats on my QX and it s constantly throw CEL. I’ve tried turning the O2 bung at different angles hoping it’ll help fix the issue but same result, i get a CEL every so often after clearing the code.

So could you guys recommend another brand that won’t throw CEL?

Thank you in advance.
 
I had the same issue with the ISR extenders. What you'll need is a shorter extension, 1.5" worked for me. On the newer cars there is one code you'll get if it's too far away and a different if it's too close. M18 x 1.5 O2 Extender. Also stay away from ISR gaskets. Go OEM or any reputable brand. ; )
 
Thanks for the info LA, could you share a link to where i can order the 1.5 extender?

I did also notice the gaskets that came with the ISR cats are crappy, i ll switch them out to OEM.
 
Here is where I bought mine, but looks like they are sold out. However the picture should help you find it elsewhere.
 
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