Welcome to the North American Subaru Impreza Owners Club Monday December 11, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
New England Subaru Impreza Club
Go Back   NASIOC > NASIOC Chapters > New England Impreza Club Forum -- NESIC

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 08-11-2003, 02:04 PM   #1
Camperguy
Scooby Specialist
 
Member#: 21274
Join Date: Jul 2002
Location: Western Mass
Vehicle:
2002 Mc_Bains car
I use to have a WRX :(

Default Guys running a catless down-pipe and cel fix.Any probs with OBDII testing?

Hey I am going with a catless down pipe but am keeping my stock mid-pipe.I guess I`m going with a Pony-Express mil eliminator and was wondering if the OBDII emmisions testing will see this or will it pass?

Bill
* Registered users of the site do not see these ads.
Camperguy is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 08-11-2003, 02:46 PM   #2
Karl
Scooby Specialist
 
Member#: 13110
Join Date: Dec 2001
Chapter/Region: NESIC
Location: Rhode Island
Default

From what I understand, if they put a scanner on your car, and the ecu passes all the OBD II readiness, you pass emission.
No sniffer, no rollers (even for 2wd vehicles)
At least this is the case in Rhode Island.
(Of course, you have to pass all other safety testing too.)
Karl is offline   Reply With Quote
Old 08-11-2003, 02:50 PM   #3
Snowphun
Scooby Guru
 
Member#: 1800
Join Date: Jul 2000
Chapter/Region: NESIC
Location: Central CT
Default

In theory you should be fine, as the ECU is reporting everything to be within specs. But what may be an issue is what the MIL fix is doing to the voltage reported back to the ECU. It may be "in spec" as far as the ECU is concerned, but it may be clearly wrong to the monitoring software (like reporting far too clean for example).

I would recommend installing any MIL fixes as discreetly as possible.

Paul
Snowphun is offline   Reply With Quote
Old 08-11-2003, 03:10 PM   #4
Jon [in CT]
*** Banned ***
 
Member#: 2992
Join Date: Nov 2000
Chapter/Region: NESIC
Location: Connecticut, USA
Vehicle:
02 WRX Sedan
Silver

Default

Quote:
Originally posted by Karl
From what I understand, if they put a scanner on your car, and the ecu passes all the OBD II readiness, you pass emission.
No sniffer, no rollers (even for 2wd vehicles)
At least this is the case in Rhode Island.
(Of course, you have to pass all other safety testing too.)
I believe this is correct and the keyword is readiness. When they hook up the scanner to your OBD-II connector they're looking for two things: Is the MIL commanded "OFF" and do all I/M monitors indicate "READY?"

It has been reported in thread http://forums.nasioc.com/forums/show...hreadid=367865 that the "MIL fix" may prevent the catalyst monitor from ever indicating "READY." If so, you'll never pass emissions - they'll tell you to come back at some future date for a retest because one of your I/M monitors came up "NOT READY."
Jon [in CT] is offline   Reply With Quote
Old 08-11-2003, 03:39 PM   #5
Sith_Lord
*** Banned ***
 
Member#: 40619
Join Date: Jul 2003
Location: www.cultofthejedi.com
Default

My understanding is that the MIL eliminator sends a signal to the ECU as voltage in an acceptable range to indicate a fully functioning catalytic convertor. Am I off base here?
Sith_Lord is offline   Reply With Quote
Old 08-11-2003, 05:34 PM   #6
coyote73176
Scooby Specialist
 
Member#: 36576
Join Date: May 2003
Chapter/Region: Tri-State
Location: New Fairfield, CT
Vehicle:
2k2 WRB wrx WAGON
16G'd & FMIC'd

Default

not trying to hijack this thread, but after reading the other thread, the CEL fix for the uppipe won't effect the readiness in the EGT sensor to the computer?
coyote73176 is offline   Reply With Quote
Old 08-11-2003, 08:48 PM   #7
Jon [in CT]
*** Banned ***
 
Member#: 2992
Join Date: Nov 2000
Chapter/Region: NESIC
Location: Connecticut, USA
Vehicle:
02 WRX Sedan
Silver

Default

Quote:
Originally posted by Sith_Lord
My understanding is that the MIL eliminator sends a signal to the ECU as voltage in an acceptable range to indicate a fully functioning catalytic convertor. Am I off base here?
I think you probably are off base. It looks like the MIL eliminator changes the resistance or impedance that the ECU sees when it tries to measure the O2 sensor's temperature. The ECU is fooled into believing that the O2 sensor isn't hot enough to provide accurate readings. The ECU can't run it's catalyst efficiency check until the rear O2 sensor reaches operating temperature. The MIL elimantor apparently doesn't work on 2004 WRXes. I'm guessing that the 2004 WRX ECUs now set a timer and if it pops and the rear O2 sensor still hasn't reached operating temperature, the ECU throws a "bad sensor heater" trouble code.

This, of course, is merely speculation.
Jon [in CT] is offline   Reply With Quote
Old 08-11-2003, 08:51 PM   #8
coyote73176
Scooby Specialist
 
Member#: 36576
Join Date: May 2003
Chapter/Region: Tri-State
Location: New Fairfield, CT
Vehicle:
2k2 WRB wrx WAGON
16G'd & FMIC'd

Default

you could be right with that. I checked the codes on my 02 after work today and theres an "NA" after the H02 (heated 02 sensor). I guess with the my02 they don't have the heated sensor.
coyote73176 is offline   Reply With Quote
Reply

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
NorCal: Perrin cat-less down-pipe w/ CEL fix kjsmith2266 Engine/Power/Exhaust 2 04-02-2009 01:17 PM
04 Stock WRX Wagon Down pipe, Headers, CEL fix wrx_gon Engine/Power/Exhaust 16 08-23-2008 09:16 PM
getting up/down pipe what cel fix TheSubyGod Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 4 02-19-2005 11:16 PM
FS: MI - Helix Down Pipe w/CEL Fix - $200 OBO (PU) toni Private 'For Sale' Classifieds 5 09-22-2004 01:40 PM
For Sale, HKS Carbin/TI cat back with Helix Down pipe and CEL fix. $800.00installed!! WRBLUEWAGON Tri-State Area Forum 8 01-28-2003 02:33 PM

All times are GMT -4. The time now is 10:28 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.