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1997 Chevy Blazer Vapor Locks

Tiny
BRIANRICHA
  • MEMBER
  • 1997 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 139,000 MILES
I have a LS Chevy Blazer that as the temp gets abouve 85 and I drive it a while, once I shut it off it will not start again for an hour or so. It is vapor lock. I have not had this problem up until this summer. Please help
Thursday, August 14th, 2008 AT 9:31 AM

1 Reply

Tiny
SWILLIAMS
  • MECHANIC
  • 597 POSTS
Check for a few things. Fuel pressure and fuel volume from the pump. Also check the residual fuel pressure. That is the pressure that the system holds when the key is shut off.
If you have 55-60 PSI and the pump can flow a pint in 30 seconds or less the pump is likely OK.

The residual pressure should not drop for a few minutes at least. If it does you will need to test to see if it is the check valve in the pump, the regulator or a bad injector sticking open.
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Wednesday, August 20th, 2008 AT 5:34 PM

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