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Old 05-07-2010, 10:50 AM   #1
britimp
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Join Date: Nov 2006
Chapter/Region: NESIC
Location: S.Deefield MA
Vehicle:
1997 Impreza OBS
1999 Legacy Wagon

Default Drive Cycle for OBD2 reset

I have had some work done on my '99 2.2L wagon to get rid of the CEL. Its looking good so far but my EVAP monitor has yet to reset so I can't take it for inspection.

I'm hearing everything from from 3 drive cycles to 40, some say specific things that need to happen others say just drive it and some folks are saying that some models have problems setting at all - and never do. The majority of money we have spent on this car has gone into the EVAP system and I'm done.

I want the monitor to set so I can get it inspected and sell the bloody thing. So what is the "Drive Cycle" for this car??

Thanks.
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Old 05-07-2010, 03:08 PM   #2
jey
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2011 Tribeca
1995 Legacy Wagon

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The evap is the slowest one to cycle. Mostly because it is only active in certain conditions - operating at a constant speed with a certain amount of gas in the gas tank. I would clear all the codes and then go for a few nice gentle drives on the interstate, see if the readiness monitor clears on it then and you're good to go.
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Old 05-10-2010, 07:35 AM   #3
britimp
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1999 Legacy Wagon

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We have been pretty scientific about it so far, my wife drove it on the interstate 4 times over the weekend and I extended my morning commute today by 30 miles on the interstate again but still the monitor has not set. Its got a bit less than half a tank of gas and no codes, pending or otherwise.

Its starting to drive me crazy.
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Old 05-12-2010, 12:24 PM   #4
britimp
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1997 Impreza OBS
1999 Legacy Wagon

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140 miles in the last two days of mixed highway and town plus gas tank at half full - still the monitor has not set.

What is the point of this system if it only self checks at this rate???????

I am so long past the sticker date too.
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Old 05-13-2010, 04:20 PM   #5
jey
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1995 Legacy Wagon

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Missouri allow for 1 or 2 systems to not be ready and still pass the car, especially older ones. Missouri also will give a 30 day extension to let the readiness monitors reset. Not sure if those are options for you...
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Old 05-14-2010, 08:05 AM   #6
britimp
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1999 Legacy Wagon

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Over 200 miles in 4 days and still incomplete monitor on Evap and no codes.

Massachusetts does not allow wiggle room on the OBD2. The light needs to be off and the monitors all set. The only thing they do offer is if you have to spend more than $600 getting the emissions fixed on a car this old then you can get a waiver that allows you to pass for one year - then you start the process all over again.

I just can't believe it should take this long for the self diagnostic system to run a pressure test on the gas tank.
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Old 05-15-2010, 04:38 PM   #7
jey
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1995 Legacy Wagon

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Maybe there is a legitimate problem with your Evap system. Is your gas cap working properly?
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Old 05-16-2010, 06:19 PM   #8
kirbykirb
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clear the code,
autozone and similar places offer free obd2 reading + clearing.
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Old 05-17-2010, 07:37 AM   #9
britimp
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1997 Impreza OBS
1999 Legacy Wagon

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After 350+ miles the monitor set
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Old 05-17-2010, 02:43 PM   #10
jey
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1995 Legacy Wagon

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Quote:
Originally Posted by kirbykirb View Post
clear the code,
autozone and similar places offer free obd2 reading + clearing.
WRONG. That will just set him back further. His issue is not that there are codes to be cleared, it's that there are readiness monitors that are not coming up as ready AFTER the codes have been cleared, and emissions tests look for readiness monitors to be set.


Quote:
Originally Posted by britimp View Post
After 350+ miles the monitor set
Good to hear that it finally set.
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Old 05-17-2010, 05:32 PM   #11
kirbykirb
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2005 WRX/9-2x
Obsedian Black Pearl

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Quote:
Originally Posted by jey View Post
WRONG. That will just set him back further. His issue is not that there are codes to be cleared, it's that there are readiness monitors that are not coming up as ready AFTER the codes have been cleared, and emissions tests look for readiness monitors to be set.




Good to hear that it finally set.
Really, well okay. I feel dumb now. :'(
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Old 08-21-2010, 02:45 PM   #12
yosheeut
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Baby Blue

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hey, i got a 2005 impreza outback sport. i recently removed the battery to change the headlight. and when i went to check emission, they said the on-board diagnostic system was not ready for testing. does anyone know the drive cycle for this car? i hope its not 350 miles, cus i dont have insurance and the car is not registered under my name. i can't register it until i get emission tested. poop, i hate my life.
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