Go Back   Ford F150 Forum - Community of Ford Truck Fans > Pre-1997 F150 > Engine Talk > 6 Cylinder Engines
Sign in using an external account
Register Forgot Password?


Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 08-16-2014, 04:58 PM   #1
Junior Member
 
Join Date: Aug 2014
Location: Norfolk, VA
Posts: 7
Mentioned: 0 Post(s)
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default 91 4.9 starts then dies right away

some times it starts and runs for 5 minutes or so but it runs very rich. i replaced plugs wires cap and rotor. intake gaskets. fuel pressure regulator. i just tested the fuel pressure and it runs right around 45-50 psi. i am at a complete loss on what to do next. i can't read the codes because the previous owner butchered the wiring i guess. SOS
hulltech is offline   Reply With Quote
Old 08-16-2014, 05:13 PM   #2
Member
 
Join Date: Aug 2014
Location: Illinois
Posts: 63
Mentioned: 0 Post(s)
Thanks: 0
Thanked 3 Times in 3 Posts
Feedback Score: 0 reviews
Default

The best way would be to try and get some codes but if you can't it'll just be a bit harder. Have you checked how the intake valves are adjusted? What's your compression at? If its running rich that means there's not enough air with the fuel. I would start there next before I replace anymore stuff.
YoungDiesel is offline   Reply With Quote
Old 08-16-2014, 05:13 PM
 
 
 
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 01:02 AM.


Copyright 2006 - 20011 F150forum.com
This site is in no way affiliated with the Ford Motor Company.