http://cgi.ebay.com/ebaymotors/Oxyge...QQcmdZViewItemdo you guys think these works on a 98 audi a4 1.8t because I have no catalitic and my check engine light is turning on

 

yes they do but check this link out

http://images.google.co.uk/images?hl...ages&gbv=2

 

It might work, I have seen it not work for some people though. Youll still get a fault code with that type of thing, but probably not a CEL. You can accomplish the same thing by using non foulers (search) which pull the rear 02 sensor out of the flow of CEL causing exhaust gases for about $3-$6 depending on if you use one or 2 of them together. Ive had my test pipe and non foulers in for a couple weeks/200+ miles and havent gotten a CEL.

 

so do you have to put them on both of the oxygen sensors or only in the second one and could I buy the non foulersat a local autozone or where .... thanx

 

Just for the rear 02 sensor. The brand name is HELP, and they are 18mm... I found mine at advance auto parts. Check out the middle of this thread for more info on them: http://forums.audiworld.com/a4/msgs/2511177.phtml

 

search the forums man...easy as pie, and they both go in the secondary port. [&:]

 

I bought a 90* sensor spacer from Wayne Schmidt on VW Vortex, I just installed it yesterday, I'll see how it works. Here is a link to my DIY on AG.
http://www.audigeeks.com/forums/index.php?topic=2167.0

 

Ya i know about that guy and his speacial 90 degree spacer, people have great luck with it... If these non foulers ever fail me Ill be buying from him before I go splicing into the 02 sensor wiring!

 

I brought my car to a mechanic and told me to purchased a O2 sensor simulator when my secondary audi oxygen sensor is malfunctioning. This could save hundreds of dollars in repairs.