Impala While undergoing many facelifts in its history, the Impala has proved itself to both civilians and police forces as one of the most capable 4-door cars GM has ever offered. Currently moving towards its 10th generation the Impala is one of the longest lasting and popular models.

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

2005 Impala 3.4L

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Old Sep 11, 2020 | 8:25 AM
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Default 2005 Impala 3.4L

My car starts fine first thing. I drive for about 5 to 10 minutes shut it off wait a few minutes and it hard starts or not at all. Then I can get it started and it runs fine after that. I've thrown parts at it on both sides. Fuel and spark. I need options at this point. I've replaced cam, both crank sensors temp sensor checked coils injectors.
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Old Sep 12, 2020 | 11:16 AM
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Have you changed the EVAP (Canister) Purge Solenoid ? If bad, it will cause all the problems you are having.
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Old Sep 12, 2020 | 2:26 PM
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stuck open purge would cause a hard start after refueling.

I would check for a fuel pressure leaking down. pull the vacuum line of the fpr and see if fuel is present.
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Old Sep 12, 2020 | 3:23 PM
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Thank you, but we checked fuel pressure and replaced the fuel pump and the pressure does not leak down.Do you have other suggestions?
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Old Sep 12, 2020 | 3:39 PM
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I've tried most of the things that seemed obvious and I'll give that a try thank you and I'll let you know
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Old Sep 19, 2020 | 12:26 PM
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I put the new evap sensor on and that didn't change a thing. What else could it be that we haven't tried yet. It's funny that after the first hard start it acts fine.
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