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Old 08-09-2010, 07:32 AM   #1 (permalink)
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Default 98 Forester OBD2 Drive Cycle?

Can anyone tell me where to find the OBD2 Drive Cycle for my 98 Forester?

About three weeks ago I spent time in my Forester with the A/C on, trying to get cool on a 100+ degree day. After several cool of visits, my car started idling badly and popped back a few times. That is when the engine light came on. What is also when I notices that my car was due for the annual emissions inspection. I took it for a drive and blew out the the carbon and it is back to running great as always. I figured the CEL would reset it's self after a period of normal driving.

After a week, the MIL was still lit, so I bought an ODB2 tester and found that the CEL was from a back fire (no big surprise). But apparently those do not clear themselves, so I did a manual reset.

Now I have been driving for several days, and there are still two systems that have not completed their test cycles; the Catalytic Converter, and the Evap. system. I need to get my car emissions tested so I don't get a ticket. Does anyone know where I can find the OBD2 Drive Cycle for my 98 Forester? I have tries searching for it but can't seem to find it.
Thanks, Scott

Last edited by t5800512; 08-09-2010 at 07:34 AM. Reason: Bold the title
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Old 08-09-2010, 08:04 AM   #2 (permalink)
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Disconnect the battery for 10 minutes.
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Old 08-09-2010, 09:20 AM   #3 (permalink)
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Have you checked w/ emissions station? I thought you could get a check w/ one incomplete test.

I don't know the cycle, but have observed that it can take quite a while to complete the catalytic converter test.

good luck
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Old 08-09-2010, 12:17 PM   #4 (permalink)
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Last year I replaced a sensor and had AutoZone clear the ECU codes before I took it in for inspection. They gave me a hard time at the inspection station because I had a couple systems that has not completed the testing cycle. I believe they thought I was trying to beat the system or something. I was trying to avoid that this year.

I still have two incomplete tests. I was kind of hoping that someone would know what driving conditions the Catalytic Converter, and the Evap. system test require. It is definitely different that what I'm doing driving back and forth to work.
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Old 08-09-2010, 01:47 PM   #5 (permalink)
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This should be it:

Subarus drive cycle to reset all monitors to a ready state.

Subaru recommends the following conditions and drive cycle to get the monitors on its vehicles completed in the shortest amount of time:

1. Make sure the fuel tank is between one-quarter and three-quarters full; half a tank is ideal.

2. Start the engine and immediately drive the vehicle for at least 15 minutes at a speed greater than 50 mph. During the warm up, try to avoid sudden acceleration, hard braking and/or lane changes.

3. Drive the vehicle at a steady 55 mph for three more minutes. During this stage of the drive cycle, it's crucial that you keep throttle angle changes to a minimum.

4. Bring the vehicle back to the shop, hook up the scan tool and look at the status of the readiness monitors. Repeat the drive cycle, if necessary."
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