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

3 Answers

83,315

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

83,315

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.

Your Answer

Add photo

Related Questions

F-150

Looking for a Used F-150 in your area?

CarGurus has 208,987 nationwide F-150 listings starting at $1,200.

ZIP:

Search Ford F-150 Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Ford F-150 Experts

#1 OJ
OJ
Reputation 6,700
#2 dandyoun
dandyoun
Reputation 4,130
#3 tennisshoes
tennisshoes
Reputation 2,470
View All

Related Models For Sale

Used Ford F-250
563 listings starting at $1,342
Used Ford Mustang
565 Great Deals out of 43,002 listings starting at $1,699

Used Cars For Sale

2017 Ford F-150 For Sale
6 Great Deals out of 82,503 listings starting at $17,710
2016 Ford F-150 For Sale
195 Great Deals out of 57,560 listings starting at $4,922
2015 Ford F-150 For Sale
216 Great Deals out of 7,553 listings starting at $18,296
2014 Ford F-150 For Sale
507 Great Deals out of 11,501 listings starting at $12,457
2013 Ford F-150 For Sale
687 Great Deals out of 14,130 listings starting at $8,450