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Only after refueling, the hard to start engine happens?

Tiny
MO-SAN
  • MEMBER
  • 2007 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 57,000 MILES
I am having problems with vehicle it is a flex fuel. I just brought this vehicle a month ago with 57,000 miles on it. Only after refueling, the hard to start engine happens. I have to try the second or third time with assist of gas paddle before the engine will start and after that is back to normal on every start until the next refueling. It will be a great help if anyone could help out with answers of what I should be replacing. The car runs great for now, except the start up after refueling.
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Tuesday, May 10th, 2016 AT 4:58 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
This is due to fuel in the evap system, and the purge valve is stuck open.

Basically, what I would suggest is to replace the canister and the purge valve so that you are ensure to keep this repaired. However, moving forward, make sure you are not topping the tank off when refueling. More than likely the previous owner topped the tank off and it would cause the engine to flood due to the vapor coming in from the evap system.

Here is a guide that will help with this as well.

https://www.2carpros.com/articles/engine-cranks-excessively-before-starting

I am attaching the process below on the purge so let's run through this and let me know what questions you have.

Thanks
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Monday, December 6th, 2021 AT 4:28 PM

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