Have emissions related question re: 94 Grand Am - TCCoA Forums
 
LinkBack Thread Tools
post #1 of 5 (permalink) Old 10-07-2002, 03:04 PM Thread Starter
 
Join Date: Jul 2002
Posts: 29
Question Have emissions related question re: 94 Grand Am

Hi Everyone, I need some help...My wife's car didn't pass emissions today. The NOx reading was almost double what it should have been here in GA. Any ideas as to what would cause this situation? Thanks for any help,
The Green Phantom is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 10-07-2002, 03:56 PM
Refrigerator Raider Hater
Moderator
 
GreenBird's Avatar
 
Join Date: Jul 2002
Location: Vermont
Age: 36
Posts: 11,719
NOx occurs from the combination of Nitrogen and Oxygen, due to combustion temps above 1400deg. The only successful way I have heard was to replace the convertor(s). make sure to get a "3-way" as most "2-way" cats do not reduce NOx emissions.




Matt "Looks Like Egon" Davis
96 Alpine Green V8
98 Audi A8 4.2Q in Racing Green Totalled
02 Audi A8L 4.2Q in Black

I buy my OEM Ford parts at 10% over dealer cost from Steve in White Bear Lake, MN.
You drive "like a man possessed"... by a woman!
GreenBird is offline  
post #3 of 5 (permalink) Old 10-07-2002, 04:35 PM Thread Starter
 
Join Date: Jul 2002
Posts: 29
PLEASE tell me it might be something else...we replaced her convertor just a year ago to the tune of $250. I know convertors don't just "go bad" ...if it is the convertor, can you think of something that might cause it to go bad like this? Her plugs are just over a year old, it doesn't have plug wires (great thinking there Pontiac ) The check engine light hasn't come on, although it has been overheating lately. The odd thing is that the needle doesn't indicate it's running hot, it just starts boiling over. Any ideas/suggestions?
The Green Phantom is offline  
Sponsored Links
Advertisement
 
post #4 of 5 (permalink) Old 10-07-2002, 05:19 PM
 
Join Date: Jul 2002
Posts: 343
Is it the Quad 4 or the 6?


Quad 4 had a headgasket issue that rivels the 3.8 for Ford plus the head almost always warp.
I say this from experiance from both sides of the coin.
if your headgasket is bad this may be what has clogged the cats and caused the bad readings
also have you replaced the O2 sensors?
This may help...
MadDog2020 is offline  
post #5 of 5 (permalink) Old 10-09-2002, 10:53 AM Thread Starter
 
Join Date: Jul 2002
Posts: 29
It's the Quad 4. We had a mechanic come out and look at it, and you guys were right. The convertor was shot. From what we heard, whatever brand was on there wasn't good and had gone south. I took it back to the muffler shop and they replaced it for free with a different brand high-flow unit. I like a place that aims to satisfy their customers! Thanks to both of you for the advice,
The Green Phantom is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TCCoA Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome