Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 1997 - 2003 F150
Sign in using an external account
Register Forgot Password?


1997 - 2003 F150 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage SPONSORED BY:

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 07-03-2014, 05:29 PM
brewscrew brewscrew is offline
New User
 
Join Date: Jul 2014
Posts: 4
brewscrew is starting off with a positive reputation.
F-150 Sputters and Stalls

I have a 01 f-150, 4.6L, with 160k miles on it. Symptoms: It idles fine with an occasional surge. It sputters in all gears like a misfire (all plugs and COPS replaced 2 months ago). Sometimes it stalls out going down highway or as I turn in my driveway. It also seems like its slipping a little without the "hard jerking into gear". Occasionally the rpm meter will peg low and then return to normal. The only code that I received was P1451. I changed the canister vent solenoid but the symptoms remain. I've checked voltage on the TPS (the variable voltage checked out but I didn't get the 5V ref. voltage). I've cleaned the MAF sensor. I've also changed the fuel filter. I've resistance checked the connector to the PCM and found several pins that are at ground. I'm not sure what to do next. Any advice or tips would be greatly appreciated.
Reply With Quote
  #2  
Old 07-03-2014, 06:07 PM
Bluegrass 7 Bluegrass 7 is offline
Post Fiend
 
Join Date: Sep 2006
Posts: 5,016
Bluegrass 7 has a good reputation on FTE.Bluegrass 7 has a good reputation on FTE.
Open the power distribution box near the master cylinder and push down on all the fuses and relays to be sure they are seated.
After this if you still have an issue, the PCM likely losing power.
It may be the PCM relay contacts.
Try it an see what happens.
Good luck.
Reply With Quote
  #3  
Old 07-03-2014, 06:34 PM
brewscrew brewscrew is offline
New User
 
Join Date: Jul 2014
Posts: 4
brewscrew is starting off with a positive reputation.
I ensured all fuses and relays were seated properly and the symptoms remain. Is there a way to check the PCM relay other than just replacing it? According to my owners manual it is 304.
Reply With Quote
  #4  
Old 07-03-2014, 06:39 PM
brewscrew brewscrew is offline
New User
 
Join Date: Jul 2014
Posts: 4
brewscrew is starting off with a positive reputation.
Another symptom I failed to mention is earlier today it stalled, the theft light was blinking quickly, and it would not restart. I turned the ignition off, sat there for about 10 minutes and then it cranked up and I returned home.
Reply With Quote
  #5  
Old 07-03-2014, 08:23 PM
Alan Kocinski Alan Kocinski is offline
New User
 
Join Date: Jul 2014
Posts: 3
Alan Kocinski is starting off with a positive reputation.
almost sounds like a bad fuse or crack in a wire. if you have a hairline(rare) break in the fuse it would intermittently work. my theft light blinks fast when im running out of battery.(i like to listen to the radio and party in the bed.
Reply With Quote
  #6  
Old 07-03-2014, 08:40 PM
Bluegrass 7 Bluegrass 7 is offline
Post Fiend
 
Join Date: Sep 2006
Posts: 5,016
Bluegrass 7 has a good reputation on FTE.Bluegrass 7 has a good reputation on FTE.
Try swapping 304 with 301.
If the relay acts up note a difference in the result.
You always need to give all the known observation details but not a lot of history..
Not restarting is significant along with the Theft lamp.
If the PCM loses power, the Pats 'becomes involved' after the fact, on restart because the two systems has to talk to each other.
Be sure fuse 20 and 30 on the dash fuse panel are seated.
Good luck..
Reply With Quote
  #7  
Old 07-15-2014, 11:00 AM
brewscrew brewscrew is offline
New User
 
Join Date: Jul 2014
Posts: 4
brewscrew is starting off with a positive reputation.
Update

Well I eventually gave up and took my truck to the dealership. They called today and said I had a bad coil and it was causing Radio Frequency Interference with the PCM. I'll find out for sure next week when I pick up my truck. In the meantime I bought a 2014 F-150 EB and I love it. If my 01 is fixed It's a win win.
Reply With Quote
  #8  
Old 07-15-2014, 12:04 PM
Bluegrass 7 Bluegrass 7 is offline
Post Fiend
 
Join Date: Sep 2006
Posts: 5,016
Bluegrass 7 has a good reputation on FTE.Bluegrass 7 has a good reputation on FTE.
Under certain conditions that is possible.
A faulty coil that propagates an interfering signal back into the PCM can upset or even stop it processing intermittently.
It often feels like a sudden loss of 12 volt power as if the ignition were totally cut off and on.
Good luck.
Reply With Quote
  #9  
Old 07-15-2014, 08:27 PM
Dr. Dirt's Avatar
Dr. Dirt Dr. Dirt is offline
Posting Guru
 
Join Date: Mar 2008
Location: Flatonia, Texas
Posts: 2,409
Dr. Dirt is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by brewscrew View Post
Another symptom I failed to mention is earlier today it stalled, the theft light was blinking quickly, and it would not restart. I turned the ignition off, sat there for about 10 minutes and then it cranked up and I returned home.
I had this same problem. mine started every once in a while it would act like it was going to die while idling. several times it did die, but never while I was driving. finally one day it did die and I couldn't get it to restart....the THEFT light was flashing. I work at a dealer and I was just about to go get the shop truck to pull me back so I could figure it out and it started. I drove it over there and grabbed the scan tool to see if it was something easy. no communication to the PCM, it wouldn't start, and THEFT light again. I left it for the weekend and got my brother to come pick me up. when I got to work on monday the techs were wondering why my truck was in the shop and I explained to them. several of the older techs said replace the PCM relay and it should fix it. they said those things go bad all the time on these trucks and like expeditions. sure enough I replaced it and no problem since. it definitely was a lesson for me.
__________________
Kevin

2002 F-150 Lariat Supercrew FX4, 5.4L 2v, 3.55 LS, BFG All-Terrains, MagnaFlow muffler with duals, all LED lights, Pioneer headunit, Kicker sub and amp

"You got to drive that Ford like it's a stallion."-Jack Ingram
Reply With Quote
Old 07-15-2014, 08:27 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Need some quick help, alternator, or voltage regulator? 79ranger150 1973 - 1979 F-100 & Larger F-Series Trucks 9 09-09-2014 01:10 PM
Sputtering when accelerating, help! 03XL 1997 - 2003 F150 1 03-05-2014 12:17 AM
1997 7.5L plug wire routing jjsfrd 1987 - 1996 F150 & Larger F-Series Trucks 3 12-29-2010 04:49 AM
1995 F-150 stalls while driving kb5ylg 1987 - 1996 F150 & Larger F-Series Trucks 77 08-28-2007 04:25 PM
92 F150 Voltage Gauge doublee Electrical Systems/Wiring 0 11-07-2003 07:36 PM


Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 1997 - 2003 F150

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump



All times are GMT -5. The time now is 07:56 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
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.

vbulletin Admin Backup