Car went from getting averaging low 20s for gas mileage to mid teens.

Tiny
ALLSMANW
  • MEMBER
  • 2004 CHEVROLET IMPALA
  • 160,000 MILES
Car runs well and starts well. No sounds from engine. Car seems to be running good just gas mileage droped.
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Saturday, September 3rd, 2011 AT 6:27 PM

3 Replies

Tiny
JDL
  • EXPERT
Did you check your gas mileage the old fashion way? If not, try it. How long since a tune-up? Any applicable trouble codes?
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Saturday, September 3rd, 2011 AT 7:01 PM
Tiny
ALLSMANW
  • MEMBER
I had a tune up about a year to year and half ago. I checked my mpg calculating it.
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Sunday, September 4th, 2011 AT 6:29 PM
Tiny
JDL
  • EXPERT
Put a fuel pressure gage on it, see if pressure holds after everything is off.

Do a compression test.

If your main driving is in town, stop and go, what kind of mileage do you get on the highway?
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Sunday, September 4th, 2011 AT 6:51 PM

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