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Old 07-17-2015, 05:30 AM   #1
pdub59
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Default hardly runs under load


I have a 2003 Saturn L200 with 96k miles. Under load with the petal to the floor, RPM vary wildly, will not accelerate, and I get the following engine codes.
CODES P0171 FUEL SYSTEM TOO LEAN BANK 1 , P0172 FUEL SYSTEM TOO LEAN BANK 1 , FUEL SYSTEM TOO RICH BANK 1 ,FUEL SYSTEM LEAN, P1171 . P0303 CYLINDER 3 MISFIRE DETECTED, P0730 INCORRECT GEAR RATIO

It idles fine and runs OK at low speeds. I changed the fuel pump, had the fuel system serviced, cleaned the throttle body, new spark wires and plugs.

What could be the problem?

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Old 07-17-2015, 07:20 AM   #2
goaliemo
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I will be moving this to the L series section, as this has nothing to do with forum support.

Also, please stop by the New Member section to introduce yourself.


Sounds like you some bad 02 sensors, or a clogged cat. The cylinder misfire is more than likely the cylinder 3 plug not snug enough.

p0171, p0172, p1171 all make me believe the cat is clogged. You can do a pressure test to see if it is.

As for the p0730, you've got me on that one. Probably a solenoid going out on the tranny.
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Old 07-18-2015, 05:28 AM   #3
pdub59
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Default hardly runs under load

Thanks for the response. Have you encountered cat convert going bad at 96k before?
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Old 07-18-2015, 06:20 AM   #4
goaliemo
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Personally I have not. But check for a recall/service bulletin for you car through GM.
I know some ions (03-07) had an extended warranty on the cats up to 120,000 miles because of a clogging issue. Not sure about the L-series.
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