Question about 2008 Chevrolet Tahoe

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After driving for an hour it starts vapor locking then shuts off. After it sits for 10 mins thstarts and runs en

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This modle has a unexplained fuel pump fault. i wonder if its a factory defect. Cause as being a mehanic i came through alot of fuel pump problem and a fuel evaporator problems specially in the new tahoe although the yukon shares the same parts but a very few of them are defected. check the fuel pump pressure first, if its below the require range, replace it.

Posted on Oct 01, 2010

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Vapor locking


What make , model an year vehicle ?Engine size too. Vapor lock is something that was associated with carburetors not fuel injection ! Do you have a check engine light lit on the dash ? How long must it sit before it starts ? Are the cooling fans working ? Sometimes they keep running after engine shuts off , depending on engine temp.

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Well I have had this problem with these cars before. Every time I had one of these cars do this it always turned out to be the fuel pump. It would start perfect when it was the first time you started it for the day but when it was warm it would quit after awhile of driving it. Also it did seem to do it more if there was a 1/4 tank or less of gas. Also when i would drive them for a bit and shut it off and let it sit for about 15 mins and go out to restart it it would start super hard and run crappy till i got it going down the road. I think there is some seals in the fuel pump the go bad and start taking in a little air causing the car to get vapor locked. I just know when I had this problem I replaced the fuel pump and never had the problem again. Hope this helps. Don't forget to rate this. Thanks

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