My truck starts and stays running as long as i am pushing the gas. Why wont it stay running?

Asked by Sep 03, 2013 at 12:53 AM about the 1999 Ford F-150 XLT LB

Question type: Maintenance & Repair

It getting some gas to carburator
when pushing gas. But, dont get gas
when the gas is not push. What
would make this happen?

1 Answer

335

With my 1994 F150 302 v8, it was the bypass valve, near the intake manifold. Started out revving up high then nearly stalling on first start then evening out after warming up, went to clean it, and had to keep foot on gas afterwards to keep it running without having to touch gas. Easy to replace and reach. Since the 99 is a different engine, it may be different fix but try for that, shouldn't be too much different.

Your Answer

Add photo

Related Questions

  • why wont truck stay running? 3 answers

    have a 1976 f150 4wd with a 390. the truck turns over and fires but wont stay running unless you keep the key turned. as soon as u let off it dies. have changed the cylenoid, tested the ignition mod...

    1976 Ford F-150

    -

    Maintenance & Repair

  • My truck wont stay running 1 answer

    I have a 1995 F-150. It has duel tanks. Ran out of gas and now the only way to get it started is to spray starter fluid in the carb. Although this will start the truck it will not remain running unl...

    1995 Ford F-150 Eddie Bauer SB

    -

    Maintenance & Repair

  • truck won't stay running 17 answers

    have had some problems keeping truck running, a couple of weeks ago was stopped at red light and truck died got towwed home now it will start but won't stay running runs good for about a minute and sm...

    1991 Ford F-150 S SB

    -

    Maintenance & Repair

  • my truck wont start or idle by itself 7 answers

    i have a 2004 ford f150 5.4l lariat triton it turns over but wont start and if i spray starter fluid in it ; it will start but i gotta stay on the gas it wont idle alone but what i dont get is why w...

    2004 Ford F-150 Lariat Ext. Cab SB 4WD

    -

    Maintenance & Repair

  • Truck won't stay running 4 answers

    I have a 1987 ford f150 5.0L recently I had to jack the motor up and change the oil pump ever since then the truck won't stay running no longer than a minute. It'll crank up and after a few secon...

    1987 Ford F-150 XL Standard Cab SB

    -

    General

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 7,930
#2 dandyoun
dandyoun
Reputation 4,360
#3 tennisshoes
tennisshoes
Reputation 2,770
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,716 Great Deals out of 175,751 listings starting at $1,250
Used GMC Sierra 1500
825 Great Deals out of 68,199 listings starting at $2,484
Used Dodge Ram 1500
453 Great Deals out of 11,152 listings starting at $700
Used Ford F-250 Super Duty
344 Great Deals out of 46,938 listings starting at $1,895
Used Toyota Tundra
444 Great Deals out of 34,312 listings starting at $2,700
Used Toyota Tacoma
542 Great Deals out of 40,814 listings starting at $2,495
Used Ford Mustang
472 Great Deals out of 45,735 listings starting at $1,999
Used Ford F-250
481 listings starting at $3,475
Used Ford Explorer
946 Great Deals out of 72,518 listings starting at $1,000
Used Chevrolet Tahoe
549 Great Deals out of 29,234 listings starting at $1,699
Used Ford Ranger
197 Great Deals out of 5,805 listings starting at $1,650
Used Jeep Wrangler
277 Great Deals out of 18,163 listings starting at $2,950

Used Cars For Sale

2017 Ford F-150 XLT LB For Sale
4 listings starting at $21,365
2016 Ford F-150 XLT LB For Sale
5 listings starting at $26,998
2014 Ford F-150 XLT LB For Sale
4 listings starting at $16,997

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.