300ZX (Z32) Performance / Technical Discussions related to Turbo charging, Supercharging, Engine, ECU, exhaust, and etc. performance enhancements and Techical related.

Keeps failing SMOG

Thread Tools
 
Search this Thread
 
Old 09-26-2014, 12:05 PM
  #1  
Registered User
Thread Starter
 
Bruno Figarola's Avatar
 
Join Date: Jun 2014
Location: Northern California
Posts: 7
Keeps failing SMOG

So here goes it.. I have 91 300zx TT and it wont smog.. This is what I know about it since Ive started working on it. The ecu and O2 sensors were the first thing I changed out. (ECU wasnt displaying the CEL) It seemed to help my fuel consumption and I put new Cats on it as well. Ive had Z cars before (lemans sunset 350z track). This is my first turbocharged one. Mods are; HKS Catback, some shitty intake which i think is the problem and Greddy BOV's. Now Ive done some research and when you run BOV's it can cause a rich condition... How do I remedy this? Also I'm in the market for some stock or better re-circulation valves as I am not a huge fan of the loud noise everytime I shift. Plus apparently they are more efficient then aftermarket ones anyway???
I have pictures of the results from both failures. Annnd this is what I found after I took a look at the intake wtf!?
Bruno Figarola is offline  
Old 09-26-2014, 07:07 PM
  #2  
Registered User
 
zxguy1986's Avatar
 
Join Date: Aug 2013
Posts: 1,103
Welcome to ZDriver!

Your pix didn't post. When you click on Post Reply or Reply, check out the little paper clip to the right of the smiley face just above the writing space. Click on the paper clip and locate the photos you want to post with your reply.

Thanks
zxguy1986 is offline  
Old 09-27-2014, 12:08 PM
  #3  
Registered User
Thread Starter
 
Bruno Figarola's Avatar
 
Join Date: Jun 2014
Location: Northern California
Posts: 7
My bad here they are and smog results from the last time I went.
Attached Thumbnails Keeps failing SMOG-img_0440.jpg   Keeps failing SMOG-img_0439.jpg   Keeps failing SMOG-img_0442.jpg  
Bruno Figarola is offline  
Old 10-01-2014, 03:16 PM
  #4  
Registered User
Thread Starter
 
Bruno Figarola's Avatar
 
Join Date: Jun 2014
Location: Northern California
Posts: 7
So anybody have any thoughts? Im replacing the intake this week figured I should start there.
Bruno Figarola is offline  
Old 10-01-2014, 10:25 PM
  #5  
Registered User
 
PredatorZ's Avatar
 
Join Date: Apr 2011
Location: A Shady Tree in Boise
Posts: 1,032
best stay stock

From what I have been able to gather, after reading all your posts, everyone seems to think BOV's fail for the z32TT, the stock recirculaters are more efficient, and just better all around. The overwhelming opinions I found were that the stock setup is very good, makes lots of power and is just easier to deal with. I posted some additional info on your other thread, hope this helps !
PredatorZ is offline  
Old 10-02-2014, 12:49 PM
  #6  
Registered User
Thread Starter
 
Bruno Figarola's Avatar
 
Join Date: Jun 2014
Location: Northern California
Posts: 7
I appreciate the answer! This recirc valves are hard to find in a set, went on ebay I didnt see them at all. Ill keep an eye out for part outs for sure tho!
Bruno Figarola is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
60to0
280ZX (S130) Forums
3
02-28-2013 06:51 PM
Turbo Biscuit
240Z, 260Z, 280Z Brakes, Wheels, Suspension and Chassis
4
04-01-2012 08:00 PM
blackpearlz
240Z, 260Z, 280Z (S30) Forums
3
07-28-2009 10:35 AM
turboZ87.300
300ZX (Z31) Performance / Technical
36
01-15-2008 10:53 PM
CrazyLotusTT
240Z, 260Z, 280Z (S30) Forums
1
12-01-2002 10:16 PM



Quick Reply: Keeps failing SMOG



All times are GMT -7. The time now is 09:01 AM.