1990 T-Bird Smog question???


Old 03-26-05, 02:00 AM
koolbz's Avatar
Thread Starter
Join Date: Feb 2005
Location: SF BAY AREA (east bay)
Posts: 40
Received 0 Votes on 0 Posts
1990 T-Bird Smog question???

I have a 1990 t-bird 3.8 v-6. I recently had the engine rebuilt
runs fine. However, I got a test only smog check test from dmv.
Since I have never had a problem with this car passing I was not
at all worried and just having it rebuilt further made me at ease.
I went for the test and was Floored when i was told it failed.
It passed all the usual tests but failed the NOX test.
Could someone tell me what I need to change in order to
get this Nox problem to come within limits so I can get it
registered. I cannot beleive it failed and am beside myself on what
to do. I would like to fix it myself but have never heard of this nox
Please can you help me
thank you
Sponsored Links
Old 03-26-05, 08:25 AM
hopkinsr2's Avatar
Join Date: Feb 2005
Location: canada
Posts: 1,563
Received 0 Votes on 0 Posts
Make sure the E.G.R. valve is hooked up & working. With the engine at idle, put a vacuum on the valve & the car should run rough or stall. Also check for vacuum on the hose with the engine warm & running 2-2500 rpm.
Old 03-26-05, 05:19 PM
Join Date: Nov 2002
Location: Canton Ohio
Posts: 1,397
Received 0 Votes on 0 Posts
notorious for stuck EGR valves.
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title: