Go Back   Ford F150 Forum - Community of Ford Truck Fans > Pre-1997 F150 > 1987 - 1996 F150
Sign in using an external account
Register Forgot Password?


Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 01-12-2013, 03:26 PM   #1
Junior Member
 
Join Date: Jan 2013
Posts: 4
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default HELP! Rough Idle 96 ford f150

Hello to all I am new to this forum. I recently bought a 96 Ford F150 with the 5.0 and it giving me a headache. anyways to the issue it idles pretty rough and it would stall out every once in a while not when cold or hot but when it had just been driving and then set for 30min to an hour. the stall problem has seemed to go away since i changed the plugs and wires out though. I have also cleaned the IAC valve, checked the PCV valve, gone through the vacuum lines using the decal under the hood, and I have also changed the fuel filter, air filter, and have ran a gas treatment. I am scratching my head and any help would be greatly appreciated.

New or tested good Parts:
IAC Valve
PCV Valve
Pugs and Wires
Vacuum hoses
fuel and Air Filters

also the engine was replaced by Ford factory in 2010 less that 17K on the engine
Jrw0001 is offline   Reply With Quote
Old 01-12-2013, 03:28 PM   #2
Senior Member
 
SuperGreen's Avatar
 
Join Date: Mar 2012
Location: Miami, FL
Posts: 308
Mentioned: 0 Post(s)
Thanks: 2
Thanked 5 Times in 5 Posts
Feedback Score: 0 reviews
Default

would you happen to have an RPM gage on this truck ?

if you do what are you reading ? did you do a fuel pressure test ?
__________________
1994 Ford F-150 XLT 5.8L
ProComp Suspension and Tires
35/12.5/20 XD Rockstars

220,000 Miles On The Dash. Still Running Strong.
SuperGreen is offline   Reply With Quote
Old 01-12-2013, 03:31 PM   #3
Junior Member
 
Join Date: Jan 2013
Posts: 4
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

no RPM gauge on this one and I am not a seasoned mechanic and do not have a way to check the fuel pressure. I would say the the idle seems low though when compared to my fathers 97 f150 with the 4.6 v8
Jrw0001 is offline   Reply With Quote
Old 01-12-2013, 03:35 PM   #4
Senior Member
 
SuperGreen's Avatar
 
Join Date: Mar 2012
Location: Miami, FL
Posts: 308
Mentioned: 0 Post(s)
Thanks: 2
Thanked 5 Times in 5 Posts
Feedback Score: 0 reviews
Default

okay so this truck is all stock ?

only thing i can really think of if you have no way of doing anything..
try seeing how fast the truck goes on gear without hitting the gas. lmk what that is.

if not, only thing i can tell you if you put in all those parts. take it to a shop, let them do a pressure test
__________________
1994 Ford F-150 XLT 5.8L
ProComp Suspension and Tires
35/12.5/20 XD Rockstars

220,000 Miles On The Dash. Still Running Strong.
SuperGreen is offline   Reply With Quote
Old 01-12-2013, 03:45 PM   #5
Junior Member
 
Join Date: Jan 2013
Posts: 4
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

before I change fuel filter and plugs/wires it would not pull in drive with no gas after fuel filter about 5mph and after plugs it was about 10 mph. and yes it is all stock.
Jrw0001 is offline   Reply With Quote
Old 01-12-2013, 03:52 PM   #6
Junior Member
 
Join Date: Jan 2013
Posts: 4
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Oh i also took it up to autozone and had the guy put it on the tester. I had no error codes but he did mention insufficient flow in the secondary. I assume he was talking about secondary air system but he said i need to run a fuel treatment. I had already been running acetone in it to see if that would clean it out. about 3oz acetone to 15 gallons of gas
Jrw0001 is offline   Reply With Quote
Old 01-12-2013, 05:38 PM   #7
Senior Member
 
Aktech's Avatar
 
Join Date: Nov 2012
Location: Anchorage Alaska
Posts: 1,360
Mentioned: 1 Post(s)
Thanks: 8
Thanked 54 Times in 54 Posts
Feedback Score: 0 reviews
Default

Was this a daily driver for someone before you got it? Old gas. Check the timing. Pull codes.
__________________
My dog was a truck dog not a suv dog
Aktech is offline   Reply With Quote
Old 01-12-2013, 06:34 PM   #8
Oooo a Custom Title.
 
LOCO LAPTOP's Avatar
 
Join Date: Feb 2012
Location: Coral Springs, FL
Posts: 662
Mentioned: 1 Post(s)
Thanks: 2
Thanked 25 Times in 24 Posts
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by Jrw0001 View Post
Oh i also took it up to autozone and had the guy put it on the tester. I had no error codes but he did mention insufficient flow in the secondary. I assume he was talking about secondary air system but he said i need to run a fuel treatment. I had already been running acetone in it to see if that would clean it out. about 3oz acetone to 15 gallons of gas
P0411 Secondary Air Injection (AIR) system upstream flow
* Electric AIR Pump
* Hose from AIR pump leak
* AIR bypass solenoid leak/blocked
* Hose from AIR pump blocked
* AIR bypass solenoid stuck open/closed

Do you still have the AIR pump? Might have a vacuum leak.
__________________
Daily Driver: 2013 Ford Taurus Police Interceptor 3.5L 321HP (Tuned) V6

Truck: 1996 F-150 XL 5.0L v8 390HP, 450TQ | Edelbrock Performer RPM Heads | Edelbrock Performer Truck Intake | BBK Twin 56mm TB | CompCam XE264HR Camshaft | CompCam 1.7 Rockers | PaceSetter LT Headers | Dual exhaust | Heavy Duty 4R70W | 3:55 Ford Racing Trac-Lok Diff.
LOCO LAPTOP is offline   Reply With Quote
Old 01-12-2013, 06:34 PM
 
 
 
Reply

Tags
problem, rough idle, stubling

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 05:22 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.