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Old 09-10-2013, 11:16 PM   #1
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Default GTO Code P0175

Was driving along today minding my own business when my check engine light popped on. Ran it over to O'Reillys and had them throw the scanner on it, came back P0175: Fuel System Too Rich. This car has never thrown a code since Ive owned it, but there are a couple things to note.

1. Last monday (labor day) I changed my plugs out. Used TR55's, which is what I've been using for awhile now. Gapped them to .040, which seems to be the general consensus with the gto crowd, so thats what I went with.

2. The very next day, a bolt snapped in my shitty B&M shifter, so I've only been able to effectively use 1st, 3rd, and 5th while driving the car, cuz trying to pull back on the shifter to get into 2nd 4th or 6th just results in the shifter moving back.

Could either one (or both) of these things be causing my code? As a result of my broken shifter I've been short shifting the fuck out of the car for the past week, so maybe more fuel is being dumped in than can effectively be burned off?
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Old 09-11-2013, 05:54 AM   #2
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Plug misfire should bring up a system lean code with unburnt oxygen in the exh skew ing the o2
system rich means that the PCM has been pulling fuel and fuel trims is near the end of the maximum adaptive so it tells you that you're running too rich
Did it specify whick bank or is that code both banks?
old contaminated oxygen sensors can cause this, as can a dirty mass air flow sensor
Fpr leaking into a vac line..bad pressure/regulator....stucck open inj
crimped fuel return line from poor jack placement.....

If your car has over 50k and nearly 10 year old o2s I'd say its possible they are skewed to the rich side (low voltage) along with a dirty maf reading wrong....
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Old 09-11-2013, 05:55 AM   #3
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I haven't tried to login to my motor all data from my phone so this is off the top of my head as I'm on the shitter...
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Old 09-11-2013, 07:14 PM   #4
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Thanks for the input. It went off as I was driving to work this morning, so Guess i'll just keep an eye on it.
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Old 09-11-2013, 10:46 PM   #5
 
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P0175 is rich bank 2.
That is set with a long term below negative 18% on this car.
That is pulling back a lot of fuel. Something is off, way off.
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