300 inline six terrible power & mileage

Asked by lottiedottie Feb 08, 2017 at 06:42 AM about the 1976 Ford F-250

Question type: Maintenance & Repair

Why does my 300 straight six have terrible 'power' and even worse gas mileage? I
mean, it's terrible! What can I do to greatly improve both? I believe the tranny is a
C3; two barrel Carburetor.

2 Answers
223,935

Rowefast answered 7 years ago

Sounds like the the engine needs a tune-up and a good going over.

2 people found this helpful.
Mark helpful
103,225

KenF answered 7 years ago

You don't mention the mileage on this beast so who knows how much wear and tear it has on it. Give it a tune up, check the timing, but if there is a lot of wear on the rotating assemblies there's only so much you can do without digging deeper into the motor.

2 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • 300 inline six terrible power & mileage 2 Answers

    Why does my 300 straight six have terrible 'power' and even worse gas mileage? I mean, it's terrible! What can I do to greatly improve both? I believe the tranny is a C3; two barrel Carburetor.

    1976 Ford F-250

    -

    Maintenance & Repair

  • Can i put power steering in my 1977 F250? 2 Answers

    My thruck is a 77 F250 with a 300 inline 6 is there any way to install power steering in it?

    1977 Ford F-250

    -

    Maintenance & Repair

  • Fuel mileage 1 Answer

    What do I need to change out to improve my fuel mileage on my 96 f-250 with a 5.8 motor

    1996 Ford F-250 2 Dr XL Standard Cab LB

    -

    Maintenance & Repair

  • 1989 ford f-250 looses power to the fuel selector switch then no power to the fuel pumps ive replaced the fuel pump relay and it clicks in then drops off help 1 Answer

    i loose power to the fuel pump selector swith and ive replaced the fuel pump relay when i turn on the ignition i have power to the pink black wire on the fuel tank switch then i loose power to it an...

    1989 Ford F-250 XLT Lariat Standard Cab LB

    -

    Maintenance & Repair

  • No power 1 Answer

    Ok so I have an 86' f250. I made the stupid mistake and putting the battery charger on backwards (cable colors were switched) and leaving it on 20 amps over night. So obviously it didn't charge so ...

    1986 Ford F-250 XLT Extended Cab 4WD LB HD

    -

    Maintenance & Repair

Shortcuts

Search Ford F-250 Questions

CarGurus Experts

  • #1
    Gene Arnett
    Reputation
    2,070
  • #2
    MikeSt
    Reputation
    1,000
  • #3
    MrRatchet42
    Reputation
    810
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford F-150
338 Great Deals out of 15,311 listings starting at $1,712

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. Content will be removed if CarGurus becomes aware that it violates our policies.