Rough idle only in gear

Asked by Apr 20, 2016 at 12:57 AM about the 1978 Ford F-150

Question type: Maintenance & Repair

Warming up idles rough then sometimes it will run great
but then most of the time when I stop at a stop light driving
through town it will just sputter rough idle and almost die
sometimes I have thought maybe a messed up Valley got
new plugs in it any thoughts

4 Answers

107,315

Could be time for a carb rebuild, was it updated to run this trash they call fuel today? If not that might be your problem and you should also replace all the rubber fuel lines with the new multi fuel hoses. This is assuming that you have checked for vacuum leaks at all the hoses and intake.

It has a rebuilt motor and a new carb on it but Ithe should be capable of running regular fuel it's only a 78

107,315

Ok then apparently it hasn't been set up properly, you will have to adjust the air mixture screws in the carb base. You may want to check out you tube for a video on how to do this if you haven't set one up before, it's fairly easy once you learn how.

It could be the torque converter it may not get enough oil for it to spin

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 224,156 nationwide F-150 listings starting at $1,300.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    9,710
  • #2
    dandyoun
    Reputation
    4,660
  • #3
    tennisshoes
    Reputation
    3,370
View All

Related Models For Sale

Used Ford Mustang
431 Great Deals out of 41,722 listings starting at $1,488
Used Ford F-250
413 listings starting at $2,900

Used Cars For Sale

2018 Ford F-150 For Sale
15 Great Deals out of 131,851 listings starting at $18,092
2017 Ford F-150 For Sale
206 Great Deals out of 17,789 listings starting at $18,000
2016 Ford F-150 For Sale
235 Great Deals out of 7,576 listings starting at $16,997
2015 Ford F-150 For Sale
503 Great Deals out of 11,075 listings starting at $9,500
2014 Ford F-150 For Sale
753 Great Deals out of 14,881 listings starting at $7,000

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.