Loss of mileage

Tiny
JUSFISHIN
  • MEMBER
  • 2001 GMC JIMMY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 220,000 MILES
2001 jimmy 4.3 sudden25% LOST MILEAGE was geting 400 kms now 300 kms aprox
changed wires and plugs already
Saturday, January 22nd, 2011 AT 3:53 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,779 POSTS
Make sre the air filter is clean. Check the catalytic converter is clean and free of plugging. If the check engine light is on, have the computer scanned for trouble codes.
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Friday, March 4th, 2011 AT 1:24 PM

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