Go Back   Ford F150 Forum - Community of Ford Truck Fans > Late Model F150s > Engine / Drivetrain Talk
Sign in using an external account
Register Forgot Password?


Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 08-12-2012, 02:08 AM   #1
Junior Member
 
Join Date: Aug 2012
Posts: 9
Mentioned: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Default 92 ford f150 300 inline 6 rough idle HELP!

Well i am trying to help my father fix his truck he has a 92 f150 2wd with a 300 inline 6. It has irratic idle when it is first started and only runs on 5 cylinders i am stumped to what the problem is. I was thinking it could possibly be a intake manifold gasket or possibly a map sensor?. It will run as long as you feather the gas pedal but as soon as you let off it shuts off. Maybe its because this is my first experience with a inline 6cyl ford fuel injected engine. But i assume this to be the worst ford engine ever produced. Can not figure out the issue for the life of me the truck only has 66 thousand original miles on it and if i can't figure it out its going to the scrapyard. I always owned fords and never had this many problems please help.
inline6cylfordssuck is offline   Reply With Quote
Old 08-12-2012, 10:48 AM   #2
Member
 
alpo's Avatar
 
Join Date: Aug 2012
Location: OK
Posts: 90
Mentioned: 0 Post(s)
Thanks: 4
Thanked 5 Times in 4 Posts
Feedback Score: 0 reviews
Default

The erratic idle could be something as simple as a broken/loose vacuum line. I had a '93 Mustang that had plastic vacuum lines - they would crack and break over time, and the engine would run like crap.

See if you can get the engine running and listen for a loud hiss.
alpo is offline   Reply With Quote
Old 08-12-2012, 12:00 PM   #3
Junior Member
 
Join Date: Aug 2012
Posts: 9
Mentioned: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Default

I will have to try that but would a vaccum leak cause a dead cylinder?. At this point it could be a few different things wrong. And after having this many problems with this truck i don't personally think i will ever buy a ford with a inline 6 cylinder in it this one is really starting to tick me off lol.

Last edited by inline6cylfordssuck; 08-12-2012 at 12:07 PM.
inline6cylfordssuck is offline   Reply With Quote
Old 08-15-2012, 02:35 PM   #4
Member
 
m83f150's Avatar
 
Join Date: Jul 2012
Posts: 37
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

The only good inline six motor ford made was the 300 six with one barrel carb on it. Those motors will run forever. Check the spark plug if it just soaked in gas the plug wire could be shot . Thats one way to have the motor not run on all cylinders
m83f150 is offline   Reply With Quote
Old 08-15-2012, 10:09 PM   #5
Junior Member
 
Join Date: Aug 2012
Posts: 9
Mentioned: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Default

It has new wires and plugs. It also has a new distributer in it and cap and rotor.
inline6cylfordssuck is offline   Reply With Quote
Old 08-17-2012, 07:57 PM   #6
Senior Member
 
Join Date: Dec 2009
Location: Slidell, Louisiana
Posts: 149
Mentioned: 0 Post(s)
Thanks: 0
Thanked 6 Times in 6 Posts
Feedback Score: 0 reviews
Default

You could do a compression test.
05FordPower is offline   Reply With Quote
Old 09-24-2012, 04:27 AM   #7
Senior Member
 
Especial86's Avatar
 
Join Date: Dec 2011
Posts: 3,092
Mentioned: 3 Post(s)
Thanks: 126
Thanked 264 Times in 226 Posts
Feedback Score: 1 reviews
Default

I had a problematic 4.9L for years.... I had to drop a new computer in it to fix a similar sounding problem... Are you positive you have a dead cylinder?
Especial86 is offline   Reply With Quote
Old 09-24-2012, 04:27 AM
 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Join F150 Forum

 

The Mustang Source
All times are GMT -4. The time now is 06:33 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2006 - 20011 F150forum.com
This site is in no way affiliated with the Ford Motor Company.