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Hi all,

A well known trick in the watercooled VW community for eliminating CEL's after a decat is this:

Put two modified spark plug antifoul devices on the downstream o2 sensor. This causes the downstream sensor to record a lower measurement, and fool the ECU into thinking there is a cat between the sensors. Since the pre and post cat sensors change proportionally, it works where the resistor mod does not.

The antifoul devices are maybe $5 at autozone.

Instructions
S2000 Forums -> Mechanical O2 Simulator

What say ye?

GM
 

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It's been discussed in many threads. Search on P0420.
 

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Thanks for posting this, I've been meaning to do it for about a year. Maybe I will now....
 

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Great Item!!

This is what I put in about a year ago.

No CELs, works perfectly, even with the new SC! :clap:

Available from Weapon R, about $60. I got mine from Sticker City (cheaper).

Regards,
Wayne
 

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I was looking at this for another forum member last month. FWIC, Stickercity no longer sells it, folks who want it will have to get it from Weapon R.
 
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