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2004 Tahoe codes p0131 p0151 p0171 p0171 p0300. Won't rev up…

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2004 Tahoe codes p0131 p0151...
2004 Tahoe codes p0131 p0151 p0171 p0171 p0300. Won't rev up anymore
Submitted: 1 year ago.Category: Chevy
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Answered in 5 minutes by:
7/29/2017
Chevy Mechanic: Dan, Technician replied 1 year ago
Dan
Dan, Technician
Category: Chevy
Satisfied Customers: 26,061
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Hello, my name is ***** ***** I'm here to help get your problem solved.

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Chevy Mechanic: Dan, Technician replied 1 year ago

Does it idle fine? Has anything been replaced?

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Customer reply replied 1 year ago
Idles rough nothing replaced
Chevy Mechanic: Dan, Technician replied 1 year ago

Based on fact it runs rough and gives lean codes sounds failing fuel pump. When the lean codes show up it means vehicle is getting too much air or not enough fuel but a vacuum/air leak would usually not cause such a extreme loss of power. You need to do a fuel pressure test, fuel pressure should be at least 55 psi key on engine off. If low replace the fuel pump. Here are replacement instructions, let me know if you run into questions. Thanks.

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https://www.dropbox.com/s/o1p2wl28chb9k27/ct1.pdf?dl=0

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https://www.dropbox.com/s/5r660ezctsvv1nb/ct2.pdf?dl=0

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Customer reply replied 1 year ago
After a cool off it's starts working better
Chevy Mechanic: Dan, Technician replied 1 year ago

That would also point toward a failing fuel pump. Let me know if you have more questions, thanks.

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