1990 Mercury Marquis poor fuel economy

1990 MERCURY MARQUIS
59,000 MILES • V8 • 2WD • AUTOMATIC
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302ERNIE
  • MEMBER
  • 9 POSTS
this is a garage kept beauty well maintained, recent tune up plugs cap rotor,air filter , car gets 10 mpg in town 14 hwy, great power no misses no pings any clue
Jan 30, 2009 at 2:21 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi:
make sure the catylatic converter isn't starting to plug. Also, check the O2 sensors.
Feb 18, 2009 at 8:10 PM
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