Jump to content
Ultimate Subaru Message Board

1986 RX Turbo wont pass emmissions any guesses?


Recommended Posts

Cruise Limit : HC (PPM) 220 CO (%) 1.2

Cruise Emissions: 462(FAIL) 5.13 (FAIL)

 

Idle Limit: HC (PPM) 220 CO (%) 1.2

Idle Emissions 1192(FAIL) .44 (PASS)

 

Anyone have a idea on whats going on or anyone had this problem with theres.... engine was rebuilt 50,000 ago and is still tight very little blow by runs smoooth no misses..... turbo still alive and kicking no oil leaks or burning im at my end with this subaru it's about to go to the Junk Yard

Link to comment
Share on other sites

Cruise Limit : HC (PPM) 220 CO (%) 1.2

Cruise Emissions: 462(FAIL) 5.13 (FAIL)

 

Idle Limit: HC (PPM) 220 CO (%) 1.2

Idle Emissions 1192(FAIL) .44 (PASS)

 

Anyone have a idea on whats going on or anyone had this problem with theres.... engine was rebuilt 50' date='000 ago and is still tight very little blow by runs smoooth no misses..... turbo still alive and kicking no oil leaks or burning im at my end with this subaru it's about to go to the Junk Yard[/quote']

 

Let me ask a question(possibly stupid). Is it all stock, or are there any modifications done?

 

Patrick

Link to comment
Share on other sites

i had the same problem with my last EA82T. when it was at idle the O2 sensor would go flat, then run rich. to fix it i put in a heated three wire O2 sensor. then it flew through emmissions.

 

just a good new sensor may have worked but i had a custom downpipe with no cat or heat shelds. i think the cat in the downpipe helps keep it up to temp at idle.

 

-=Suberdave=-

www.suberdave.com

Link to comment
Share on other sites

Also check your ignition timing, I ran with 35degree BTDC for a while (no it wasn't intentional and no it didnt detonate or knock) and it had immense HC emissions, like 1400PPM at idle :lol:

 

So make sure yours is at 20/22 degrees @ 700rpm.

Link to comment
Share on other sites

i had the same problem with my last EA82T. when it was at idle the O2 sensor would go flat, then run rich. to fix it i put in a heated three wire O2 sensor. then it flew through emmissions.

 

just a good new sensor may have worked but i had a custom downpipe with no cat or heat shelds. i think the cat in the downpipe helps keep it up to temp at idle.

 

-=Suberdave=-

www.suberdave.com

 

I took the upper cat off of my old EA82T and put on one hotter cat. It passed with flying colors. If I were you I'd try just changing the oil as well and make sure the car is good and warmed up before running the test.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...