Finally passed SMOG!!!!!!!!
Okay...I just got my car smogged today and I'm releaved to say that I passed....but just barely. This time the NOx reading at 15mph was 414ppm, the last reading was 443ppm with a maximum allowable of 419ppm. So I basically passed by 5ppm The tech had to retest the car 3 times before it would pass....while doing the first run he knew that it was having trouble, so he sped up the car passed the 15mph mark to force the smog computer to reset...he had to do this twice before it passed. Cool guy!!!!!

After the first inital smog test that I failed I seafoamed the car, changed the passenger side O2 sensor, fixed an exhaust leak, and changed the oil. In the process of yanking the exhaust manifold to fix the exhaust leak I busted a bolt in the head . So I just used a **** load of RTV and a new header gasket to seal it up...it leaks and ticks but seems to run okay with a minor miss however I'm still getting high NOx readings. Anyone have a clue what this may be? The car is a 97' Z28 with 72K on the clock...with OEM wires and plugs

I don't have to worry about a smog check for another 2 years....so the long tubes are going on this weekend heheheh.....

I would like to thank everyone that helped me in diagonsing this problem and lending me parts to get my car moving. I'll keep you guys updated on the Jet Hot long tube install.



-B

 

NOx is the product of lean A/F ratio and high combustion chamber temperatures.

This belongs on LT1 Tech, and I believe you already have it posted there, so I am closing it here.

Just about anyone who has an LT1 and most of the guys with the seemingly endless tech savvy all post on LT1 Tech as well, so there is no advantage in putting LT1 stuff on "Advanced Tech" other than having it move a little more slowly to the bottom of the page.