Gas mileage has dropped drasticaly

avatheps
0

Asked by Mar 02, 2013 at 12:47 PM about the Honda CR-V

Question type: Maintenance & Repair

I bought the car new and for years have gotten 24-26 mpg. Almost overnight the mileage has dropped to 20mpg or less. The car has 160K miles on it but runs like a champ and rather than buy new I would rather keep it if I can get my mileage back. Within the past 3 months I have had a complete tune up, new tires, new air filter, and fresh oil change. The maintenance light is on and the shop told me it has a vapor leak, but 2 trips back and they can't find the leak. Could this be the source of my problem? What have I missed? Help!

8 Answers

I'm going to go ahead and blame your EGR valve, opening up when it's not the right time, possibly the sensor that makes this happen, MAF MAP etc...your trouble codes would tell you what is, if you bothered to read them.

1 out of 1 people think this is helpful.

the leak is an internal vacuum leak, causing things to malfunction.

2 out of 2 people think this is helpful.

you know if you filled up to the cap, the emissions system would have a gasoline bound canister and would take time to recover and create errors...your evarporative emissions would be buggerd for a while throwing up the CEL until it was put right. Supposed to have ALL emissions sewed-up proper, if there is a leak in which some vapor can escape, it goes into B9 control robot throwing it's claws in the air and says "warning warning". I think what we are dealing with here is one confused polution control system. Take it to the smog guy who will uncover/discover these malfuncioning emissions controls-

1 out of 1 people think this is helpful.
Jonathan Ford
3,915

what year? maintenance light and check engine light are different things...if its the maintenance light then someone forgot to reset it...if it is a check engine light you could take it to autozone and have them scan for any codes for free. also what was included in the complete tune up?

1 out of 1 people think this is helpful.
Js08016
53,155

The shop may be talking about the EVAP system. This emission control system recycles gasoline vapors back to the engine to be burned up rather than be released into the air (required federally since 1971, since 1970 in California). If this system malfunctions it will effect gas mileage and turn on your check engine light. I'd change the thermostat. If it's stuck open your engine won't reach operating temperature. This will also greatly affect gas mileage. HTH. -Jim

1 out of 1 people think this is helpful.
opusp
65

Have 2007 CR-V EX, and was getting 27-30 MPG, until I had tires replaced, MPG fell overnight to 20- 25. Complained to tire store, they said new tires, thicker tread will cause lower MPG. Still not happy with answer, 6 months later.

6 out of 6 people think this is helpful.
Jonathan Ford
3,915

what kind of tires?

2 out of 2 people think this is helpful.
Imranulhaq Khan
0

Most likely heavier or oversize tires with aggressive thread will lower MPG

Your Answer

Add photo

Related Questions

  • What could have caused such a drastic drop in mpg so suddenly? 4 answers

    My 2003 Honda civic has always averaged 30mpg until I had a cam sensor replaced. Since the I get 19-20mpg. Mechanics checked every out and found no reason for the drop in gas mileage. It could be coin...

    2003 Honda Civic DX

    -

    Maintenance & Repair

  • replaced timing belt,tensioner, etc. did not move crank or cam pulleys now timing off,hard to start sputters,?? 1 answer

    Of course things are gonna move a little , seems drastic out of time,maybe I wasnt carefull enough to keep timed, run through timing pulley marks , T>D>C

    1987 Honda Civic Wagon

    -

    Maintenance & Repair

  • HONDA CROSSTOUR BRAKE? PROBLEM 7 answers

    Recently my Crosstour slowed down but the engine rpm was increasing. I had been going about 65mph at just over 2000rpm and suddenly the car slowed to about 45 and the rpm increased to over 3000. ...

    Honda Accord Crosstour

    -

    Maintenance & Repair

  • Bad Gas Mileage too. 1 answer

    Three weeks ago, I bought an 02 EX 4WD with 124,000 miles and on a Thanksgiving trip, I got 24 mpg averaging 77 mph on the way there using premium gas and 20 mpg on the way back averaging 83 mph using...

    2002 Honda CR-V EX AWD

    -

    General

  • is the 1999 honda civic a good bush beater? 3 answers

    i want to get an old civic as a beater is that a good car?

    1999 Honda Civic

    -

    Shopping & Pricing

CR-V

Looking for a Used CR-V in your area?

CarGurus has 80,420 nationwide CR-V listings starting at $1,400.

ZIP:

Search Honda CR-V Questions

Honda CR-V Experts

#1 Tom Demyan
Tom Demyan
Reputation 2,690
#2 PEng
PEng
Reputation 1,360
#3 saman2812
saman2812
Reputation 1,350
View All

Related Models For Sale

Used Toyota RAV4"
1,000 Great Deals out of 45,331 listings starting at $2,690
Used Honda Accord"
1,201 Great Deals out of 75,065 listings starting at $1,395
Used Honda Pilot"
510 Great Deals out of 17,896 listings starting at $1,800
Used Honda Civic"
1,007 Great Deals out of 56,074 listings starting at $995
Used Nissan Rogue"
794 Great Deals out of 65,682 listings starting at $3,890
Used Ford Escape"
1,470 Great Deals out of 91,375 listings starting at $500
Used Toyota Highlander"
608 Great Deals out of 27,143 listings starting at $2,987
Used Subaru Forester"
337 Great Deals out of 17,903 listings starting at $1,099
Used Toyota Camry"
1,537 Great Deals out of 95,390 listings starting at $895
Used Hyundai Santa Fe"
624 Great Deals out of 33,750 listings starting at $800
Used Nissan Murano"
415 Great Deals out of 22,902 listings starting at $1,295
Used Toyota Corolla"
1,322 Great Deals out of 65,700 listings starting at $699
Used Toyota 4Runner"
318 Great Deals out of 16,981 listings starting at $1,900
Used Subaru Outback"
372 Great Deals out of 26,590 listings starting at $1,299
Used Mazda CX-5"
167 Great Deals out of 20,382 listings starting at $9,685