1990 4.9 got me stumped - Ford F150 Forum - Community of Ford Truck Fans



1990 4.9 got me stumped

Reply
 
 
 
Thread Tools Search this Thread
Old 12-01-2017, 10:13 AM   #1
Junior Member
Thread Starter
 
Join Date: Dec 2017
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Default 1990 4.9 got me stumped

I am trying to revive this truck for a friend of mine, and it has been sitting for 10 years. Changed oil, filter, gas filter, dist cap, plugs, and wires, fresh ags in front tank. It ran like a champ when I test drove it. Called my buddy and he came over and tried to start it and it ran like CRAP! didn't do anything to it between my test drive and him trying it. Eventually found a bad fuel pressure regulator, replaced that and it's better but still no joy. Pulled the injectors ald cleaned and tested them and they SEEM to be fine. Still runs rough, pulled the plugs and they were ALL carbon fouled. Checked all my vacuum lines and can't find a vacuum leak. Any suggestions? Thanks in advance for any help.
Tommy Martin is offline   Reply With Quote
Old 12-03-2017, 07:50 AM   #2
Senior Member
 
Join Date: Oct 2016
Location: Ohio
Posts: 163
Thanks: 0
Thanked 27 Times in 22 Posts
Default

As poorly as its running, I would check for codes before doing anything. Seems there is a ton of fuel being administered.
raski is offline   Reply With Quote
Old 12-06-2017, 07:44 PM   #3
Senior Member
 
wde3477's Avatar
 
Join Date: Jul 2007
Location: Cape Girardeau MO
Posts: 2,653
Thanks: 0
Thanked 62 Times in 62 Posts
Default

Welcome to the site!
Agree with the suggestion to pull the computer codes. Also, suggest to check the fuel rail pressure to verify it's at least 40psi, 45 preferred.
Good luck and keep us posted.
wde3477 is offline   Reply With Quote
 
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -4. The time now is 05:34 PM.


Copyright 2006 - 2017 F150Forum.com We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: