Go Back   F150online Forums > Powertrain & Mechanical > V8 Engines
Sign in using an external account
Register Forgot Password?

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
  #1  
Old 01-23-2012, 07:56 PM
Member
 
Join Date: Sep 2009
Location: The Great Lake State
Vehicle: 2001 Ford F-150
Posts: 29
'01 F-150 5.4 runs rough, no codes

I have an '01 F-150 4x4 S'crew with 5.4L, 155,000 miles. Idles rough, runs rough (at speed, actually cuts out sometimes at speed), low power, pcv valve is clattering loud and it has no codes.

I did a cylinder drop test (pulled each coil wire, then pulled each injector wire) under load and all of the cylinders are firing fine. It has a recent fuel filter, K&N filter recently cleaned, and no water has been sprayed on the engine. I am at a loss for what next. I am thinking that my convertors may be plugged? Anyone have an idea?
Reply With Quote
  #2  
Old 01-23-2012, 08:18 PM
Senior Member
 
Join Date: Oct 2009
Location: Corona, Crazyfornia
Vehicle: 2003 ford f150
Posts: 2,219
Clean the MAF the K&N filters have a tendency to foul them up from the oil.
__________________
Love my box stock V-6
Reply With Quote
  #3  
Old 01-23-2012, 11:46 PM
Member
 
Join Date: Sep 2009
Location: The Great Lake State
Vehicle: 2001 Ford F-150
Posts: 29
Quote:
Originally Posted by jgger View Post
Clean the MAF the K&N filters have a tendency to foul them up from the oil.
Thanks jgger, I'll give it a try.
Reply With Quote
  #4  
Old 02-25-2012, 03:20 PM
Member
 
Join Date: Sep 2009
Location: The Great Lake State
Vehicle: 2001 Ford F-150
Posts: 29
further on the issue

So,

I did the MAF clean out and that helped a little (about 20%), so I decided to tune up with motorcraft plugs and add the accel super coils...runs awesome now and has power it hasn't had in years (three of my coils were cracked on top).

It still has a very noticeable vibration that shakes the whole truck although the engine is running great. So I was thinking back and last summer I had been on the dunes at Silver Lake and I had hit Test Hill at too sharp of an angle and nosed the bottom of the front end into the dune which caused my skid plate to bend back and up into my fan (which took off one blade). I doubt that one blade off the fan could cause the severity of the shake the whole truck experiences so I am wondering if my harmonic balancer might be gone. I know it's rare but maybe the force of the impact damaged it somehow?

Last edited by speccop; 02-25-2012 at 03:23 PM. Reason: omitted information
Reply With Quote
  #5  
Old 02-25-2012, 03:24 PM
glc glc is offline
Senior Member
 
Join Date: Dec 2006
Location: Joplin MO
Vehicle: 2003 Ford F150
Posts: 28,584
One blade off the fan WILL cause severe vibrations. Replace it!

Good luck with those Accel coils, by the way. They have a high failure rate.
__________________
2003 F-150 XL RCSB 2wd 4.2 M5OD 3.55 LS
Reply With Quote
  #6  
Old 02-27-2012, 08:24 PM
Member
 
Join Date: Sep 2009
Location: The Great Lake State
Vehicle: 2001 Ford F-150
Posts: 29
Thanks glc, I'll change it out. Yeah, my Ford mechanic told me about the accel issues, but I figure if they fail it's ea$ier to replace one Motorcraft coil at a time as opposed to all of them. I have noticed that the accels are louder.
Reply With Quote
  #7  
Old 08-07-2012, 02:22 PM
Member
 
Join Date: Sep 2009
Location: The Great Lake State
Vehicle: 2001 Ford F-150
Posts: 29
Quote:
Originally Posted by glc View Post
One blade off the fan WILL cause severe vibrations. Replace it!

Good luck with those Accel coils, by the way. They have a high failure rate.
Yep...it WAS the fan. Vibration gone.
Reply With Quote
Old 08-07-2012, 02:22 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 On
Refbacks are Off


All times are GMT -4. The time now is 02:12 PM.





This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company
 
Contact Us Advertising Privacy Statement Terms of Service Jobs Forum Text Archives
Emails & Contact Details