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1999 Chevy Blazer Poor fuel economy

Tiny
JOSHCONLEY
  • MEMBER
  • 1999 CHEVROLET BLAZER
Engine problem
1999 Chevy Blazer V6 Four Wheel Drive Automatic 125000 miles

Hi, I'm having problems with my cars fuel economy, after I changed the fuel pump, could a 4 to 5 below regular fuel pressure be causing poor mileage? I've heard some people say it might be the fuel regulator, but I'm not sure. Any help would be greatly appreciated.

Have a great life/ day

- Josh
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Saturday, December 8th, 2007 AT 11:17 AM

1 Reply

Tiny
DENNYP
  • MECHANIC
  • 1,823 POSTS
If your fuel pressure regulator is leaking, It will cause poor fuel economy. You need to check your fuel psi and make sure it is within specs. Also, make sure the pressure will hold for at least 10 min with the key on and engine off. If it doesn't, you have a leak somewhere.
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Saturday, December 8th, 2007 AT 1:31 PM

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