1999 Ford F150 5.4L Running Rough at Idle - Ford F150 Forum - Community of Ford Truck Fans



1999 Ford F150 5.4L Running Rough at Idle

Reply
 
 
 
Thread Tools Search this Thread
Old 05-24-2010, 10:31 PM   #1
Junior Member
Thread Starter
 
Join Date: May 2010
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Default 1999 Ford F150 5.4L Running Rough at Idle

I have a 1999 f150 lariat with a 5.4L. It recently started running rough at idle so I replaced the pcv valve and fuel filter. After replacing these it still ran rough. I took it up to advanced auto and and had them do a check engine light read and it said 3 of the 4 o2 sensors were bad. I replaced all 4 o2 sensors and it ran fine for about a day and the check engine light came back on. I again took it up to advanced and had them hook it up and now its saying its running lean. I am alittle stumped and to short on cash to take it to a shop. I had thought maybe mass flow air sensor but I am not really sure. I would greatly appreciate any help.
1999f150lariat is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2005-2006 Ford F150 Truck Power Dual Arm Towing Upgrade Mirror with Black Textured Ca 1ATony Vendor Showcase 27 Yesterday 10:10 AM
2004 Ford F150 Truck New Body Style Power Heated Turn Signal Upgrade Dual Arm Towing 1ATony Vendor Showcase 12 09-14-2016 02:57 PM
Rough Idle/Misfiring - HELP! (2006 F150 5.4L v8) carp104 2004 - 2008 Ford F150 39 08-09-2016 07:32 PM
What should be the rpm idle? crazyrwe General F150 Discussion 3 09-02-2015 10:50 PM


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 10:28 AM.


Copyright 2006 - 2016 F150Forum.com