car runs bad

2005 CHEVROLET IMPALA
121,000 MILES • 3.4L • 6 CYL • 2WD • AUTOMATIC
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BEVERLY MAYNARD
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  • 31 POSTS
i have put on fuel pump filter ecr valve pressure regulator last is the ignition coil module connector that I thought was it but it runs worst than it did can you tell me what have I miss
Jul 4, 2017 at 2:13 PM
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STRAILER
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Hello,

Here are a couple of guides that can help you.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

and

https://youtu.be/QTE8k06MzwQ

Please run some tests and get back to us we are interested to see what it is.

Cheers, Ken
Jul 5, 2017 at 5:19 PM
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BEVERLY MAYNARD
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  • 31 POSTS
thank i'll try thanks again
Jul 6, 2017 at 12:52 PM
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