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2014 Chevrolet Impala
Includes: Bel-air
Platform: B-body & W-body

03 Impala LS hesitation

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Old November 26th, 2012, 1:16 PM
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Default 03 Impala LS hesitation
Hello, this is my first post and sadly, it's a problem. A few months ago I bought a fully loaded LS w/ the 3.8. It has developed a miss and hesitation mainly at high rpm. I have changed the coil packs, plugs, wires, fuel filter, air filter, and egr valve. It's been hooked up to a computer Several times and nothing, it's still fighting me and HATES hills. I'm open to any suggestions. Thanks!
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Old November 26th, 2012, 5:33 PM
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Check your fuel pressure.
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Old November 26th, 2012, 6:42 PM
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Never thought of that. Will do first thing in the morning!
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Old December 3rd, 2012, 12:54 PM
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She's throwin code # 404. Has anyone had to deal with this? I'm not the greatest with electrical problems.
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