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04-06 Ralliart Engine/Drivetrain (no forced induction)

Obd code P0172 help

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Old Jun 16, 2014 | 03:33 PM
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Zeraven's Avatar
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Obd code P0172 help

Hello. I have a 2006 Ralliart.

To make the long story short it overheated, swapped quite a few parts but it's back up. Now, it's having an issue which is that when I stop (red light) the revs seem to be unstable, and if I have the AC on, most of the time the car feels like, or turns off.

A friend of mine plugged an Obd and we got code P0172 , "too rich".

This is my "going to work car". I dont race or anything, its an automatic and it's just for work/famoly trips, do you know its not been "abused of".

I will post a complete list of parts swapped if you need it.

Thanks in advance for all the help!
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Old Jun 16, 2014 | 06:40 PM
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please list all parts that were replaced.
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Old Jun 17, 2014 | 04:36 AM
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√ block cover screws
√ Piston rings
√ Piston Bearings
√ block cover (sorry if name's not right)
√ spark plugs
√ timing belt
√ Retainer
√ the other belt (sorry, not that car saavy)
√ block gasket
√ valve gaskets
√ o rings
√ intake gasket
√ oil and filter
√ Radiator
√ Water pump

Block cover got a bit bent so they "rectified/pressurized it".

Can works perfectly except for that issue at idle.
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Old Jun 17, 2014 | 02:04 PM
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none of those parts are relevant to the issue. I thought you meant that you replaced some sensors to try to fix the problem.


so basically you ruined your motor, and now you're reusing all the old sensors after rebuilding the engine? did you get new plugs and injectors? P0172 is a fuel/emissions problem, and is more likely a sensor or valve. problem is that it could be any one of a variety of things.
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Old Jun 17, 2014 | 06:59 PM
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After checking everything again we found something.

The small pipe that goes from the filter enclosure that has the MAF sensor was broken! Will be fixing it ASAP. Hopefully this is what's causing all this.

FYI: the engine overheated due to a faulty radiator. Most parts were changed just because we had the engine opened already, just so the car hopefully runs for a few more years.
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Old Jun 17, 2014 | 07:07 PM
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mine's got like 240,000km on it, still runs fine.

and yes, a leak in the intake system can cause all sorts of problems.
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Old Jun 18, 2014 | 12:13 PM
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Should i fix/swap the filter enclosure or get a cone filter? I was wondering if i had to mod anything (flash?) or if i can just cut the tube with the MAF and put the filter at the end of it.

Last edited by Zeraven; Jun 18, 2014 at 12:29 PM.
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Old Aug 25, 2014 | 05:50 PM
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Did you find your solution to this?
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Old Aug 25, 2014 | 05:51 PM
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I just randomly got this code, then it went away. Now it's back.
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Old Aug 26, 2014 | 09:27 AM
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Interesting fact, right after I posted that I hopped in my car. Light is gone again.
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