abl

Car keeps failing for NOx. HC and CO is fine. Any ideas? possible cylinder head temp sensor? Can I do an on board computer diagnostic?

thanks. Tom

Gsolo

check if your EGR still works properly

__________________
Student at UTI Avondale
2nd place SkillsUSA/VICA WA State Automotive Maintenence '04
had an 87 pulsar...still planning CA20DET
1970 Chevy BelAir 350V8 300hp...soon to get M21

maddogg89plsr

I kept having that prob, i ended up getting it smogged illegally, but try checking the EGR and all the lil valves that are connected to it thru vac lines.

maddogg89plsr

i got a new EGR valve sitting around somewhere if ur interested it has like 200 miles of use.