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Throwing codes: any help?

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Old 03-21-2010, 01:46 AM
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mustangcat
Deputy CatDog - To Purr'tect and Explode
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Default Throwing codes: any help?

P0171 System Too Lean - Bank No. 1.
P0300 Random Misfire Detected.

I had the fuel pump/filter replaced 15,000 miles ago(3 years.) Recently it's been feeling like it's in "limp mode." It gets up to speed ok, but it's sluggish and lots of vibration. Even at idle, it feels like it's skipping around...Lots of vibration that shakes the car back and forth. Strange thing is....The car acts just fine when first starting it. But...it starts getting worse and worse after about 4 minutes of driving.

Any ideas?
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