Guys i failed emmsisions a week ago. I have a 1991 z-28 350 with 73,000 miles on it and the engine runs great. When the car hasen't been running for a few hours then i start it up theres puff of blue smoke that comes out of the exhaust. I failed the first part of the emmsion test, "NOX" part. I passes the second part. I just barely failed the NOX part but failed it by enough so the guy didnt let me slide through and pass me. I haven't gotten a tune up for about a year and a half which i think may be contributing to me failing emmisions. Can you guys help me?

------------------

• Red '91 Z-28 350
• T-tops
• no major power
  gaining mods, K&N
  Filter, Flowmaster
  exhaust -series 80-,
  exhaust cut-outs

 

https://www.thirdgen.org/messgboard/...ML/006556.html


Check that stuff out, and get back to us.

It may be That you are Running a little lean, Just a guess tho.

Could also be the Cat, as madmax suggested, if its only off a little.



------------------
60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype