1986 fanger 2.3 before and after rebuilt gets gas in oil get 5 mpg why?

Asked by Jun 20, 2013 at 01:30 PM about the 1986 Ford Ranger STD Standard Cab 4WD SB

Question type: Maintenance & Repair

3 Answers

25,305

A few things to check: with the engine off, remove the vacuum line on the fuel pressure regulator and see if there's raw fuel in the vacuum line. You can cycle the key on for a couple of seconds but don't try to start it. Raw fuel = blown fuel pressure regulator. Change the regulator and the oil. Check for a blocked or pinched fuel return hose. Do a compression check. Rings can cause a concern like this too - excessive blow-by. Are there any codes in the computer? A MAP sensor failure can cause the system to go full rich and dump a lot of fuel too. AIT and ECT sensors will also force a system rich.

we rebuilt engine it still has gas in oil get 5 mpg haven't checked fuel return thanks

25,305

I covered all the issues I can think of that could cause bad mileage and cylinder wash-down providing that the engine was assembled correctly and the valve timing is right. 5 mpg is incredibly low. Unheard of for a 4 cylinder. Driving a vehicle in this condition will burn out a Catalytic Converter, cause the exhaust manifold to glow red and overheat the engine. Of course, when you change the oil after 500 to 7500 miles is will smell a little like gasoline - that's normal because there is no such thing as a perfect seal from the rings.

Your Answer

Ranger

Looking for a Used Ranger in your area?

CarGurus has 5,522 nationwide Ranger listings starting at $1,000.

ZIP:

Ford Ranger Experts

  • #1
    tennisshoes
    Reputation
    1,320
  • #2
    F_O_R
    Reputation
    830
  • #3
    Tracy Hooks
    Reputation
    820
View All

Related Models For Sale

Used Ford F-150
2,221 Great Deals out of 180,841 listings starting at $1,500
Used Chevrolet S-10
8 Great Deals out of 1,263 listings starting at $999
Used Dodge Dakota
130 Great Deals out of 3,697 listings starting at $1,650
Used Ford Mustang
740 Great Deals out of 42,668 listings starting at $1,300
Used Jeep Wrangler
271 Great Deals out of 15,857 listings starting at $2,997

Used Cars For Sale

2011 Ford Ranger For Sale
28 Great Deals out of 797 listings starting at $3,950
2010 Ford Ranger For Sale
23 Great Deals out of 484 listings starting at $4,395
2009 Ford Ranger For Sale
19 Great Deals out of 356 listings starting at $3,500
2008 Ford Ranger For Sale
25 Great Deals out of 415 listings starting at $3,195
2007 Ford Ranger For Sale
19 Great Deals out of 294 listings starting at $2,300

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.