NA2 with aftermarket NA1 headers

[RYU]

Hi guys,

Any NA2 Owners running aftermarket headers on high flow cats? If so, got any cure for the CEL? We're on 91-94 GT-One headers with the anti-fowlers on the rear O2s HFCs, but can't figure out how to get rid of the CEL.

In theory this shouldn't be rocket science

 

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I do. NA2 with SOS headers and Toda high flow cats.
I use these:

They have a very small cat element inside where you can see the small holes.
Have them (or the same but straight) on front AND back sensors.
They work flawlessly so far.

 

[Reifen]

^^^^^^ Exactly what he said

I actually just installed longer 90° bungs and all the CELs disappeared.

 

[RYU]

Awesome guys! Thank you! I think the key are those small holes or any way the flow of exhaust gasses to the rear O2s can be limited. I didn't understand the concept of those anti-fowlers until I gave it some thought. [HASH=1279]#NA2Problems[/HASH] which NA1 guys don't have haha

 

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Note that they have a small catalytic element inside too, at least this model. Someone I know has a similar setup (NA2, same setup as mine) but without the catalytic extensions and he's got a CEL with codes for the lambda.