High Nox readings.....Failed Smog yet again. Help!

Started by 87toyotaman, May 19, 2012, 01:40:43 PM

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87toyotaman

May 19, 2012, 01:40:43 PM
First off its an 87 22r. The past 3 years I passed with flying colors now all of a sudden I'm getting high NOX readings.

What I've done....

Cleaned air filer

New Cat

New Spark Plugs/wires

New Gas cap

Idles perfect

Drove and hour before test

Running 87 octane with guaranteed to pass


What it could be.....

87 Turd with a lot of gadgets glued on

Snowtoy

#1
May 19, 2012, 02:05:48 PM
With a new CA cat on it already, you might try pulling and cleaning the EGR valve and checking the air injection valve(if it is a CA smog equipped vehicle).  On an '86 I restored about 5yrs ago the Air injection valve was bad causing high NOX, fortunately I had a spare, new ones run about $300.

'90 black X-cab mod'd 3.0, 33's/4.88's, rear ARB, custom bumpers, sliders, safari rack, etc.
'91 Blue X-cab 22re, 35's/5.29's,Truetrac front, ARB rear, dual cases, and custom Safari flatbed, bumper, interior.
The money pit '87 Supra resto/mod

Slolyfe

#2
May 19, 2012, 02:56:50 PM
Quote from: Snowtoy on May 19, 2012, 02:05:48 PM
With a new CA cat on it already, you might try pulling and cleaning the EGR valve and checking the air injection valve(if it is a CA smog equipped vehicle).  On an '86 I restored about 5yrs ago the Air injection valve was bad causing high NOX, fortunately I had a spare, new ones run about $300.




I have those parts. my truck passed 1 year ago. pm me
You'll never take me alive

kneedownnate

#3
May 19, 2012, 11:01:06 PM
I've always gently scraped them out with whatever fit, but I don't see compressed air being any good for it.
RIP KYOTA

You can go through life being scared of the possible, or you can have a little fun and tease the inevitable.

Give a man venison, he'll eat for a day. Teach a man to hunt Blacktail, he'll be frustrated for life!

TRACKER

#4
May 25, 2012, 07:26:51 PM
Quote from: Snowtoy on May 19, 2012, 02:05:48 PM
With a new CA cat on it already, you might try pulling and cleaning the EGR valve and checking the air injection valve(if it is a CA smog equipped vehicle).  On an '86 I restored about 5yrs ago the Air injection valve was bad causing high NOX, fortunately I had a spare, new ones run about $300.



check egr and port
Pride - is what drive a man to do his very best even when no one is looking ..

87toyotaman

#5
May 26, 2012, 09:49:49 AM
Quotecheck egr and port

That was it  :biggthumpup: Thanks
87 Turd with a lot of gadgets glued on
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