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Old 05-31-2003, 12:02 AM   #1
Burnout
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Member#: 4721
Join Date: Mar 2001
Chapter/Region: South East
Location: Asheville
Vehicle:
2002 2.5 RS
1997 Brighton

Question Lets play Whats Wrong With My Car!

Before my car would start to buck and hesitate real bad after being driving hard for some time. It would idle funny.......the exhaust note would not be solid, it would rise and fall like its about to stutter and stall out, and it did stall out a couple of times. Then when i would drive normal the problem would go away only to return when driven hard for some time. When i say driven hard i mean basically racing, shifting at redline and keeping the revs up....autocross, ect... Well I finally got a Check Engine light and got it scanned before it went away. This is what i got:

P0122 Throttle position sensor circuit low input
P0172 Fuel trim malfunction (A/F too rich)

I have a 2002 2.5RS with a Cat-back exhaust and COBB CAI.

Since then the car has gone back to normal and the light has gone away, this is so fustrating!
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Old 05-31-2003, 05:35 AM   #2
JSiwek
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Member#: 14909
Join Date: Feb 2002
Chapter/Region: BAIC
Location: Bay Area, CA
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While I was reading your first sentence, I thought it might be a throttle position sensor problem. Since your car is under warranty, I would get it checked and replaced if they find a problem, tell them the codes that were thrown and see what they say. Don't tell them that you raced it , and it probably wouldn't hurt to put your stock intake back on.

My other suggestion would be that there's a vacuum leak, which could definitely, definitely affect idle and would act much like a faulty throttle position sensor. Make sure all of your hoses (look particularly towards the back of the engine compartment like near the firewall and around the throttle body) are fully on whatever little barbs or pipes or whatever they're supposed to be attached to and that they're properly clamped on there.

If that doesn't fix it, take it immediately to a dealership while the car is exibiting symptoms and have them figure it out.

Jeremy
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Old 06-02-2003, 03:23 AM   #3
Avenger
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Member#: 1234
Join Date: Apr 2000
Location: Vancouver, Canada
Vehicle:
2000

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A dead front A/F sensor.

But not sure about the throttle code.
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Old 06-02-2003, 01:21 PM   #4
Supraru
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Member#: 23313
Join Date: Aug 2002
Location: Collegeville,Pa
Vehicle:
99' 2.5Rs
black

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I got a fuel trim code on mine before and they said it was because of my intake, I know that may sound like i got suckered but I thought it sounded right because I was running real rich because of the intake and I was burning basically 4 qts every 1k miles.
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Old 06-03-2003, 05:55 PM   #5
Burnout
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Member#: 4721
Join Date: Mar 2001
Chapter/Region: South East
Location: Asheville
Vehicle:
2002 2.5 RS
1997 Brighton

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JSiwek i checked out all my hoses and they were all tight. I know its not my intake since its been on the car for over 30k. Could a faulty TPS make it read rich? Seems possible.
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