Hi all,

I have a '99 Sunfire GT 2.4L, and I failed the emissions test due to high Oxides of Nitrogen (NOx). I've spent the last three days looking for the EGR valve until I read here I may not have one.

First, would someone be able to direct me to a picture or definative information about whether I should have an EGR valve or not?

Secondly, how would I clean the EGR system on this car?

Thanks!

how do u know that the EGr is the problem? It could be the Cat or car might need a tune up, or bad O2?


Ryan1

I'm not certain it's the problem, it just seems like a good place to start. There are no codes being thrown.

Previous owner had a tune-up done not too long ago; my scantool shows the oxygen sensors switching okay; and if the 02 sensors are okay I'm presuming they would set a code for cat inefficiency.

try a bottle of dry gas. worked wonders for my english teacher... lol seriously though.

Any of these help


http://www.j-body.org/forums/search.php?search=NOx&f=11&globalsearch=0&match=1&date=0&fldsubject=1


Alont

EGR vavle should through a code like mine did....280$ egr vavle later it was fine... fire it up shortly w/out the valve on it if its dirty then carbon will fly outt. oughta do it