1997 f150 w/5.4 triton runs rough under load - Ford F150 Forum - Community of Ford Truck Fans

1997 f150 w/5.4 triton runs rough under load

Thread Tools Search this Thread
Old 07-02-2009, 12:33 PM   #1
Junior Member
Thread Starter
Join Date: Jul 2009
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Default 1997 f150 w/5.4 triton runs rough under load

I have a 97 F150 with 5.4 Triton. It only has 75,000 miles and has been serviced regularly. A few months ago it started running rough while driving and also at stop lights it would idle up & down. I replaced the MAF sensor and the idle up & down stopped, however I still have hesitation and roughness under load (accelerating, uphill, etc.). It never threw an engine code until I pulled my boat. I had it scanned and the code was P1131 (insufficient mixture, O2s 1/1, lean. I thought maybe I forgot to erase the old code after the MAF sensor replacement, so I disconeced the battery and cleared this code. It still runs rough under load. I have checked the air filter/canister for debris, all vacuum lines & O2 sensor and all is fine. Someone mentioned a bad coil pack, but said that will always throw a misfire code, which I don't have.

Any help would be great. I fear towing my boat since it runs so much worse under that load. I would hate to get stuck on the boat ramp and not able to pull out of the water!!!

PLEASE HELP!!!!!!!!!!!!!!!!!
DKOTLAREK is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Rough Idle/Misfiring - HELP! (2006 F150 5.4L v8) carp104 2004 - 2008 Ford F150 42 02-05-2017 02:26 PM
Changed vct solenoids at 151k engine tick went away redfishtd 2004 - 2008 Ford F150 21 12-30-2015 11:25 PM
could this be a blown head gasket?? tyguy88 2004 - 2008 Ford F150 7 11-03-2015 01:46 PM
Rough Idle At Operating Temp While In Gear ericarrendale 1997 - 2003 Ford F150 11 09-15-2015 03:56 PM
could this be a blown head gasket?? tyguy88 2009 - 2014 Ford F150 5 09-03-2015 04:00 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 11:34 PM.

Copyright 2006 - 2017 F150Forum.com