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1993 Plymouth Voyager Excessive Fuel Consumption

Tiny
DEEKSTER
  • MEMBER
  • 1993 PLYMOUTH VOYAGER
I have a 1993 Plymouth Voyager, 120,000 miles, 6cyl, that is only getting 9 mpg. When I first relaced the plugs and wiring, and air filter, ( 2 weeks ago), my mpg jumped to 18 mpg and now it has dropped down to 9 mpg. Could this be a faulty sensor robbing me of my mpg? I have checked for leaks, (none), and there is no smell of gasoline when driving or parked. Please help. Thanks.
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Friday, March 2nd, 2007 AT 11:09 PM

2 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
Very well could be, seems that Oxygen sensors are more apt to do this. With a proper scanner, the oxygen wave patterns can be observed to see if they are lazy. Other problems that can affect gas miliage is a stuck thermostat. Does the van come up to temp and give good heat within 5-10 minutes?
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Saturday, March 3rd, 2007 AT 6:11 AM
Tiny
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I usually have heat in 5-10 minutes
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Saturday, March 3rd, 2007 AT 12:03 PM

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