GalantVR4.org The Mitsubishi Galant VR-4 Forum
Galant VR-4 Forums » Galant VR-4 » Technical Discussions » Failed Emissions
Previous thread Next thread

Failed Emissions


forced4door
Unregistered


Galant VR-4 org Post #: 296893 posted 01/21/06 12:04 PM     Remind Me!  Send Private Message   Edit Post      
I just got back from my emissions and I failed due to too high of HC at idle. It was 373.6 and the limit is 220. I would like to know whats causing this and how I can cure my emissions problem.

| | | IP: (69.76.92.198) | Report this post to a Moderator

Yiuwa
Right-hand Member


Galant VR-4 org Post #: 296898 posted 01/21/06 12:16 PM     Remind Me!  Send Private Message   Edit Post      
Mods?



1992 RHD Hong Kong ver E39A

Posts: 641 | From: Pokfulam, Hong Kong | Member Since: 08/10/03 | IP: (203.34.154.24) | Report this post to a Moderator

forced4door
Unregistered


Galant VR-4 org Post #: 296899 posted 01/21/06 12:18 PM     Remind Me!  Send Private Message   Edit Post      
None, bone stock. 167k

| | | IP: (69.76.92.198) | Report this post to a Moderator

jogalant
jobidet
1892/2000


Galant VR-4 org Post #: 296901 posted 01/21/06 12:25 PM     Remind Me!  Send Private Message   Edit Post      
Hope this helps...

Hydrocarbons:

Measured in PPM (parts per million), this is the result of unburned fuel making it out the tailpipe. This failure is usually caused by an ignition (misfire), or an engine problem such as a bad valve. An engine running too lean will often have excessive HC due to what is called a "lean misfire". Any leaks in the intake system or bad injectors will also cause excessive HC due to uneven fuel distribution.

Failed the HC!

Check the ignition system first. This usually caused by an ignition miss. Then check the engine. Poorly seated valves, leaking head gaskets, or other compression problems will put the HC readings through the roof. Also check for vacuum leaks and the injector spray patterns. Remember, HC failures are usually caused by compression or ignition problems. Improper fuel distribution/vacuum leaks will cause misfires that will cause excessive HC.



1892/2000




Posts: 1177 | From: FL | Member Since: 07/29/05 | IP: (70.187.251.219) | Report this post to a Moderator

forced4door
Unregistered


Galant VR-4 org Post #: 296902 posted 01/21/06 12:31 PM     Remind Me!  Send Private Message   Edit Post      
yeah thanks, that was helpful.

| | | IP: (69.76.92.198) | Report this post to a Moderator

forced4door
Unregistered


Galant VR-4 org Post #: 296909 posted 01/21/06 12:47 PM     Remind Me!  Send Private Message   Edit Post      
The car has good compression so how should I go about checking the ignition system for a misfire, how can I find out which cylinder its at?

| | | IP: (69.76.92.198) | Report this post to a Moderator

teet
Senior Teeter


Galant VR-4 org Post #: 296919 posted 01/21/06 01:21 PM     Remind Me!  Send Private Message   Edit Post      
if you have a true misfire you'll feel it.

more likely you're getting "incomplete" burn due to a weak ignition or the computer is adding too much fuel due to a worn out Oxygen sensor.

replace:
plugs
wires
Oxygen sensor

You'll pass no sweat.

john

Posts: 1245 | From: northwest | Member Since: 03/08/01 | IP: (134.134.136.2) | Report this post to a Moderator

forced4door
Unregistered


Galant VR-4 org Post #: 296923 posted 01/21/06 01:35 PM     Remind Me!  Send Private Message   Edit Post      
Upsteam or downstream O2 sensor?

| | | IP: (69.76.92.198) | Report this post to a Moderator

132OF2000
Unregistered


Galant VR-4 org Post #: 296928 posted 01/21/06 01:50 PM     Remind Me!  Send Private Message   Edit Post      
I also failed in WA because of high HC at idle. Turns out my cat. was bad. I replaced it and passed easily.

| | | IP: (67.171.245.76) | Report this post to a Moderator

teet
Senior Teeter


Galant VR-4 org Post #: 296929 posted 01/21/06 01:52 PM     Remind Me!  Send Private Message   Edit Post      
Quote:

Upsteam or downstream O2 sensor?




there is only one on 91-92 galant vr4s

Posts: 1245 | From: northwest | Member Since: 03/08/01 | IP: (67.160.130.105) | Report this post to a Moderator

Yiuwa
Right-hand Member


Galant VR-4 org Post #: 296951 posted 01/21/06 03:40 PM     Remind Me!  Send Private Message   Edit Post      
If you have a logger you can tell your O2 reading right away, or else try to get a voltmeter to measure it on respective PIN in ECU

If your O2 sensor is normal it should be cycling between 0 and 0.9X volt in idle, and ~0.8x volt during WOT. A dying/dead sensor will output very low voltage, which tells the ECU to inject more fuel then necessary and made you failed the test



1992 RHD Hong Kong ver E39A

Posts: 641 | From: Pokfulam, Hong Kong | Member Since: 08/10/03 | IP: (203.34.154.24) | Report this post to a Moderator

sfRstarion
Unregistered


Galant VR-4 org Post #: 297083 posted 01/21/06 11:54 PM     Remind Me!  Send Private Message   Edit Post      
Change your oil before you go in too, that'll drop the HC's a bit.

| | | IP: (71.139.42.35) | Report this post to a Moderator

MattPark
Unregistered


Galant VR-4 org Post #: 297096 posted 01/22/06 03:11 AM     Remind Me!  Send Private Message   Edit Post      
RETARD YOUR TIMING. Nothing hurts HC's like too much ignition timing. Less timing = higher EGTs = the fuel not burned in the combustion chamber burning in the exhaust system.

Also, while waiting in line, keep your RPMs up to keep the EGTs up, which will make your cat work better.

| | | IP: (172.196.226.142) | Report this post to a Moderator

Romanova
the coolest person to ever post in the past 2 hours


Galant VR-4 org Post #: 297109 posted 01/22/06 05:51 AM     Remind Me!  Send Private Message   Edit Post      
I leaned the shit out of my car while I was waiting inline... I also used some 87 octane gas and some isopropolwhateveralcohol...

Helped pass my car... no cat, no emissions stuff, blah blah blah. Try a search and you will see that you are not the first person, nor will you be the last person to fail emissions.



tyler
2016 Explorer PI
2006 LS430
2012 GX460

Posts: 3855 | From: Cypress, TX | Member Since: 08/07/02 | IP: (24.162.7.26) | Report this post to a Moderator

MattPark
Unregistered


Galant VR-4 org Post #: 297166 posted 01/22/06 01:38 PM     Remind Me!  Send Private Message   Edit Post      
Leaning it out too much can cause a lean misfire which can make it fail worse. Make sure you don't do that

| | | IP: (24.21.79.121) | Report this post to a Moderator

mj_rosenfeld
Unregistered


Galant VR-4 org Post #: 297168 posted 01/22/06 01:43 PM     Remind Me!  Send Private Message   Edit Post      
Consider testing on lowest octane gas you can safely run. Octane inhibits knock by suppressing combustion, which will tend to raise unburned HC levels.
Mike R.

| | | IP: (67.140.110.170) | Report this post to a Moderator

Mark LaVallee
"Satan's" Wrenchman
581/1000


Galant VR-4 org Post #: 297568 posted 01/23/06 02:32 PM     Remind Me!  Send Private Message   Edit Post      
With a fresh O2 sensor, mine passed handily.

Make sure it isn't burning oil, also.
And make sure the cat is HOT!!!!!
I drove mine 75 miles to another Emissions station even though I am a CT Emissions Inspector!



1982 Kawasaki KZ1000R1 Eddie Lawson Replica
1983 Honda CB1100F
ASE Master Auto Technician

Posts: 433 | From: Shelton Mitsubishi 1983-2006 R... | Member Since: 02/11/04 | IP: (216.47.188.6) | Report this post to a Moderator

IslandVr4
Unregistered


Galant VR-4 org Post #: 297576 posted 01/23/06 03:03 PM     Remind Me!  Send Private Message   Edit Post      
Retard your timing by a couple o degrees, toss some "Heat"(alcohol) into the tank & get that cat hot as hell by running up the freeway. If you have to wait in line at all keep the engine rpms up at about 2k while you wait so the cat won't cool off & you should pass given that you are very close. after you get tabs I would look into why though, if tuned properly your car should sail through.

| | | IP: (207.118.3.249) | Report this post to a Moderator

Jostar
Dialing fail
795/2000


Galant VR-4 org Post #: 297742 posted 01/23/06 10:48 PM     Remind Me!  Send Private Message   Edit Post      
Quote:

I also failed in WA because of high HC at idle. Turns out my cat. was bad. I replaced it and passed easily.




I passed emissions without a cat, i lean it out on the afc, and check my fuel trims,
i passed with flying colors, the tech was holy shit your car pass like it was brand
new, but then again people that fail emissions have other engine problems.



welded center diffs SUX

Posts: 724 | From: Chicago,il | Member Since: 12/25/04 | IP: (24.13.105.229) | Report this post to a Moderator

forced4door
Unregistered


Galant VR-4 org Post #: 299147 posted 01/26/06 07:01 PM     Remind Me!  Send Private Message   Edit Post      
Well I bet it didnt help that my plugs were gapped to .040.
New plugs, wires, and o2 sensor are in and the miss has gone away.
Ill be headed to the emissions place on saturday to try this again, hopefully with better results.

| | | IP: (69.76.92.198) | Report this post to a Moderator

forced4door
Unregistered


Galant VR-4 org Post #: 302588 posted 02/04/06 01:29 PM     Remind Me!  Send Private Message   Edit Post   
I went to the emissions station today and failed with a 223.6 HC at idle, needed 220 or lower. So I went out and drove the car for another 20 mins or so of "spirited driving" and finally passed with a 188. My galant doesnt hate me after all.

| | | IP: (134.48.185.187) | Report this post to a Moderator


Pages: 1
Previous thread Next thread

Extra information
0 registered and 8 anonymous users are browsing this forum.

Galant VR4.org Moderator:  curtis, steve, atc250r, jcgalntvr4-244, cheekychimp, jepherz, Rausch, toybreaker, iceman69510, pot, FlyingEagle 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled

Rating:
Thread views: 1377

Rate this thread


News & Events: News | Events
Galant VR-4: Newbies | General VR4 Discussions | Technical Discussions | How To and Info Archive
Marketplace: Parts For Sale | Cars For Sale | Good Guys | Bad Guys
Community: Members' Showcase

Contact Us | Privacy statement GalantVR-4.org

Generated in 0.218 seconds in which 0.138 seconds were spent on a total of 14 queries. Turbo powered.


Hertz's Galant VR-4 Page