what would cause my 81 ford f100 to fail pressure test

Asked by lbortoluzzi Jun 19, 2017 at 07:06 PM about the 1981 Ford F-100 Standard Cab LB

Question type: Maintenance & Repair

my truck passed all of the emissons test except pressure, also both caps failed

1 Answer

F_O_R answered 6 years ago

Gas tank pressure test? If so there is a leak somewhere. Maybe a filler neck hose but more likely a EVAP system issue.

Mark helpful

Your Answer:

Related Questions

  • what would cause my 81 ford f100 to fail pressure test 1 Answer

    my truck passed all of the emissons test except pressure, also both caps failed

    1981 Ford F-100 Standard Cab LB

    -

    Maintenance & Repair

  • My 1972 Ford F100 1 Answer

    My truck will start up perfectly fine and drive but when it starts to get a little warm it shuts off when you take off and when you take your foot off the gas pedal does anyone know what What is w...

    1972 Ford F-100

    -

    Maintenance & Repair

  • 81 Ford f100 4.9 inline 6 dips rpm during idle sometimes dies. Possible problem? 3 Answers

    Hey I've been working on an 81 Ford f100 4.9 online 6 manual. She runs very well. The only issue I've been having is that sometimes when I let it idle after driving (usually about 30 minutes into t...

    1981 Ford F-100 Standard Cab LB

    -

    Maintenance & Repair

  • What is causing my carb to smoke? 4 Answers

    I own a 1967 ford F100 with the six cylinder. Its got a carter one barrel and I was wonderin what would make it smoke? Could it be needle and seats? Leakin float, too high fuel pressure? What could it...

    1967 Ford F-100

    -

    Maintenance & Repair

  • What is causing the bucking in my Ford F100? 1 Answer

    I have a 1979 Ford F100 Ranger with the inline 6. Everything on the truck works. The truck starts and runs well with only a few hickups. However, when I drive it for 15-20 minutes the truck begins t...

    1979 Ford F-100

    -

    Maintenance & Repair

Shortcuts

Search Ford F-100 Questions

CarGurus Experts

  • #1
    Gene Arnett
    Reputation
    810
  • #2
    MrBlueOval
    Reputation
    510
  • #3
    Rowefast
    Reputation
    460
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford F-150
303 Great Deals out of 13,538 listings starting at $3,888
Used Ford Mustang
30 Great Deals out of 1,599 listings starting at $7,999
Used Ford F-250
6 listings
Used Ford Bronco
11 Great Deals out of 1,979 listings starting at $39,999
Used Chevrolet C/K 10
2 listings

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.