Failed Emissions Test - Toyota Nation Forum : Toyota Car and Truck Forums


» Auto Insurance
» Featured Product
Advertisement
Wheel & Tire Center

Go Back   Toyota Nation Forum : Toyota Car and Truck Forums > Toyota Truck, SUV and Van Forums > Hilux (Pickup) Forum > Truck Archive

Truck Archive Older archived threads about Toyota trucks

ToyotaNation.com is the premier Toyota Forum on the internet. Registered Users do not see the above ads.
 
 
LinkBack Thread Tools Display Modes
Old 11-29-2005, 09:47 AM   #1 (permalink)
New TN User
 
Join Date: Oct 2005
Location: California
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
View Mystos's Photo Gallery
Failed Emissions Test

The results shown below are for a 1992 Toyota Pickup, 2wd, 4 cyl, 22RE EFI.
Idle, 881 rpm: Measured HC 180 ppm Maximum HC 120 ppm
Measured CO 2.56 % Maximum CO 1.00%
2500 rpm: Measured HC 25 ppm Maximum HC 180 ppm
Measured CO .01% Maximum CO 1.00%

Thus far I have replaced the catalytic converter, the O2 sensor before the CAT, the O2 sensor after the CAT, the Cap and Rotor, the Spark Plug wires, Spark Plugs, Throttle Position Sensor, Fuel Filter, Oil and Oil Filter, Air Filter, PCV Valve, both intake manifold gaskets (not including throttle body gasket), Tested the operation of the fuel injectors (carbuerator shop).
The resistance between pins E2 and VS on the volume air flow meter is 185 ohms (should be 200-400 ohms). Resistance increases when flap is opened.
The timing is good.
The egr valve tested good.
I have checked the evaporative canister. Applied air to the tank pipe air exited the pipe at bottom of canister. Air barely escapes out of purge pipe. Applied air to the purge pipe, air barely escapes out of tank pipe.
The above results indicate a rich fuel mixture at idle which is where my problem lies.
Does anyone have a repair solution?

Thanks for the help

G
Mystos is offline   Quick reply to this message
Sponsored Links
Advertisement
 
Old 11-30-2005, 01:08 AM   #2 (permalink)
Official TN Member
 
Join Date: Nov 2004
Location: Pleasanton Ca
Posts: 889
Thanks: 0
Thanked 1 Time in 1 Post
iTrader Score: 0 reviews
View qsd-dan's Photo Gallery
"The resistance between pins E2 and VS on the volume air flow meter is 185 ohms (should be 200-400 ohms). Resistance increases when flap is opened."

I'm wondering if that air flow meter is causing the problem. Best bet would be to get a used one off of ebay. There just happens to be one on there for your truck.

http://cgi.ebay.com/Toyota-Pickup-22...QQcmdZViewItem
qsd-dan is offline   Quick reply to this message
Old 11-30-2005, 01:13 AM   #3 (permalink)
Official TN Member
 
Nad1370's Avatar
 
Join Date: Nov 2005
Location: Mid West
Posts: 342
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
View Nad1370's Photo Gallery
Leaky injector. Maybe fuel leaking past the FP regulator going in the intake.

How many miles? Replaced it with a stock cat ?
Nad1370 is offline   Quick reply to this message
Old 12-01-2005, 12:26 AM   #4 (permalink)
New TN User
 
Join Date: Oct 2005
Location: California
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
View Mystos's Photo Gallery
The VAF meter test above is out of a Chilton manual. I found another test to verify the VAF meter from a Toyota manual. I have not performed this test yet.

Initially I thought the fuel injectors were leaking as well but I had the main fuel injectors tested by a shop that rebuilds injectors and they flow tested fine. However the cold start fuel injector has not been tested.
The truck has 238000 miles on it.
The replacement cat is from a Kragen Autoparts store.

The smog tech suggested testing the fuel pressure regulator as it could be bad. Not sure how to check this yet.

Thanks for the replies.
Mystos is offline   Quick reply to this message
Old 12-01-2005, 12:41 AM   #5 (permalink)
Official TN Member
 
Join Date: Nov 2004
Location: Pleasanton Ca
Posts: 889
Thanks: 0
Thanked 1 Time in 1 Post
iTrader Score: 0 reviews
View qsd-dan's Photo Gallery
A quick and dirty check for the fuel pressure regulator is to pull the vacuum line off of it while the motor is runinng and make sure no fuel comes out.
qsd-dan is offline   Quick reply to this message
Old 12-01-2005, 03:15 PM   #6 (permalink)
Official TN Member
 
ShawnM's Avatar
 
Join Date: Nov 2004
Location: Chicago
Posts: 927
Thanks: 0
Thanked 5 Times in 4 Posts
iTrader Score: 0 reviews
View ShawnM's Photo Gallery
Defective converter? Ive put cheap aftermarket ones on that failed by the time I drove it to the test station. Same for O2 sensors.
__________________
--Shawn

03 Camry LE
97 Lincoln MarkVIII LSC
67 Mustang
ShawnM is offline   Quick reply to this message
Sponsored Links
Advertisement
 
 

  Toyota Nation Forum : Toyota Car and Truck Forums > Toyota Truck, SUV and Van Forums > Hilux (Pickup) Forum > Truck Archive

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Toyota Nation Forum : Toyota Car and Truck 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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

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 On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 04:36 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
ToyotaNation.com is an independent Toyota/Lexus enthusiast website. ToyotaNation.com is not sponsored by or in any way affiliated with Toyota Motor Sales, USA, Inc. The Toyota, Lexus and Scion names and logos are trademarks owned by Toyota Motor Sales, USA, Inc.