300ZX (Z31) Performance / Technical Discussions related to Turbo charging, Supercharging, Engine, ECU, exhaust, and etc. performance enhancements and Techical related.

1987 300zx Turbo wont pass smog!!!

Old Aug 15, 2006 | 09:25 AM
  #2  
snwbrderphat540's Avatar
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From: lemont, Illinois
try doing a full tune up, and finding a way to clean out carbon build up in your engine, however the Z31's do it. mabye your cat started rusting out? i dotn know, just some basic suggestions from me.
Old Aug 15, 2006 | 11:38 AM
  #3  
jfairladyz's Avatar
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From: Temecula, CA
Originally Posted by jeff87
I have had my 1987 300zx Turbo for about 4yrs now. It had no prior problem passing the smog test(California). But this year I took it to a smog check station and it failed with flying colors. Does anyone have any suggestions to what could be the problem(s). Anything will help thank you.

-Jeff
Before anyone can give you any solid advice you need to let us know what areas it failed in. You should have gotten a printup report of the test. Post up your results. Based on where you failed we can tell you the most likely reason why.
Old Aug 15, 2006 | 04:05 PM
  #4  
snwbrderphat540's Avatar
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From: lemont, Illinois
true that^^^ but yeah my tune up idea proly wont help you if you failed with "FLYING COLORS" its just to help outski.....
Old Aug 15, 2006 | 06:34 PM
  #5  
jfairladyz's Avatar
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From: Temecula, CA
Oh no, you had good ideas. I was just letting him know that if he can let us know how he failed then we can narrow it down for him instead him having to try everything possible. A tune up and what not is probably a good idea anyways if it's been a while
Old Sep 14, 2006 | 12:41 PM
  #6  
z-hag's Avatar
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From: warmspott, trollville.......somewhere sailing the seas--fla, virgin islands...wherever....warm water....LOL
cat was what mine needed--mine is 1986 turbo. but check out what is the off part--nox or co--and then you'll know better--the tech had no clue???
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