emissions test - Team Camaro Tech
Engine General Engine Discussion.

 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old Mar 7th, 01, 07:15 PM Thread Starter
 
Join Date: Mar 2001
Location: colleyville,texas usa
Posts: 4
Angry

i have a 86 camaro Z28 with a 350 tpi
i am having trouble passing the emissions test here in texas. i have changed the oil, filter, plugs and wires,it has a new cat back exhaust and seems to run great. but i still acn't pass the test. help please...

------------------
zilad is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old Mar 7th, 01, 08:11 PM
 
Join Date: Mar 2001
Posts: 10
Post

Which part of the test does it fail. It could be EGR inop or stuck open, bad O2 you name it. What are the readings when it fails?
Lurker is offline  
post #3 of 9 (permalink) Old Mar 8th, 01, 04:16 AM Thread Starter
 
Join Date: Mar 2001
Location: colleyville,texas usa
Posts: 4
Lightbulb

it keepes failing the emissions portion. the limit is 220...1st test was 294. i changed the plugs wires and air filters and ran a valvoline fuel injector cleaner thru it. 2nd testwas 1410...it also has a new cat back exhaust(installed about a year ago - eventhough it has only gone about 400 miles since then)---also should i change the oil? it was changed about nine months ago but has only gone a couple hundred miles since then (the previous owner let it sit for the better part of the last year)does this sound like a bad o2 sensor? where is the egr located...and how do i check it?

------------------
'86 camaro Z28 350 TPI automatic
zilad is offline  
 
post #4 of 9 (permalink) Old Mar 8th, 01, 05:44 AM
Senior Tech
 
Join Date: Feb 2000
Location: Waldorf,Md,USA
Posts: 176
Post

the 220 is the hydrocarbons limit and if you had 294 and put in new plugs and other tune-up items, it should have passed without the fuel injector cleaner. The BG products man told us not to try to run through the emmissions testing until we had run a complete tank of gas after the cleaner was used up in the present tank. What is the CO reading, you might need a new cat converter. Keep us posted on your results.

------------------
Leo Paugh
MCC #017
www.clark.net/pub/chevelle/mcc.htm
If you have no fear, you're not going as fast as you could.
chev64 is offline  
post #5 of 9 (permalink) Old Mar 8th, 01, 07:01 AM
Senior Tech
 
Join Date: Feb 2000
Location: McKinney, Tx
Posts: 3,557
Lightbulb

Shoot me an email.....KZ

------------------
John D. Smith
69' SS/396 CLONE!
http://www.geocities.com/kz1000ltd/
kz1000ltd is offline  
post #6 of 9 (permalink) Old Mar 8th, 01, 03:37 PM
 
Join Date: Mar 2001
Location: Hamilton Ontario Canada
Posts: 1
Post

I have seen HC readings rise drastically from using the injector cleaners unless you go through a tank or two of fuel. It is probably that. The EGR usually controls your nox and is probably operating normal. You definitely need to check O2 operation. Also check that the engine is getting to proper operating temp. Is the thermostat opening and closing? If the engine runs cold then the computer will commmand more fuel.
SCOTTYZ is offline  
post #7 of 9 (permalink) Old Mar 8th, 01, 03:53 PM
Senior Tech
 
Join Date: Jan 2001
Posts: 251
Post

Check out www.thirdgen.org too. What you need to do is check and see if there's any codes in the computer and if so fix em.
67stock is offline  
post #8 of 9 (permalink) Old Mar 8th, 01, 04:41 PM
 
Join Date: Mar 2001
Posts: 10
Post

Is the Check Engine Light on?

the numbers you gave sound like HC. If the HC was in the 200's before and you put wires on it and now it is 1400's maybe one of the wires is not on right. Does it run rough since you put wires on it? If it runs good then maybe chalk the HC up to the Inj Cleaner.

What is the CO number and NOX? The EGR is probably not the problem however if it is open too soon, it can cause a missfire which will give you a very high HC reading.

Based on the original numbers I'd say it wasnt missfiring before. It may be a little rich but we cant tell without CO.

Are they placing your car on a dyno when they do the test?

Lurk
Lurker is offline  
post #9 of 9 (permalink) Old Mar 9th, 01, 02:12 AM
 
Join Date: Apr 2000
Posts: 21,341
Smile

As funny as this sounds a new gas cap will cause a car to go from lean to rich because with a new cap all the gas vapors that normally got by the old cap from the carbon canister are now going into the engine and creating a rich condition where it was lean before. I saw it happen at an I/M station in St. Louis because the station manager knew what was happening and pointed it out to me and then took me aside and explained all the stuff.

The "Gateway Clean Air Program" has a pamplet that explains whats generally wrong if you want ta write them a letter and request a copy. Get on the web and find the "Gateway Clean Air Program's" home page and get hold of a guy by the name of Chuck Dachroedan, the head of the I/M section, (I think) and tell him my name and that I asked you to ask him for the literarture we are talking about.

I would be glad ta send you a copy of it but I'm in Jefferson City instead of St. Louis. Chuck is in the MO Dept.of Natural Resources St. louis Regional Office just off S. Lindberg and I-44. hope this is of interest. pdq67



pdq67 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech 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.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

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