2003 Ford F-150 problems with engine and 4X4

2003 FORD F-150
103,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
PRESTON HESTER JR.
  • MEMBER
  • 1 POST
when driving at times my F-150 would start jerking for a couple of seconds, around 30-40 mph. i had the transmission flush and service there was no problems noticed.

The 4x4 will not engage. I turn the knob to 4x4 L or High and nothing happen. I have check and tested all the fuses they were ok.
need help please, thanks you
Oct 15, 2010 at 1:59 PM
Advertisement
Avatar
RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Hi Preston Hester Jr., Welcome to 2carpros and TY for the donation. Jerking problem: check the fuel pressure, clean the MAF sensor with an electronic cleaner CRC and test throttle position sensor As for the no 4WD: check fuse no.104 30amp if okay one of the following below is causing your problem


https://images.2carpros.com/forum/automotive_pictures/12900_relay_and_module_1.jpg

Oct 15, 2010 at 7:33 PM
Avatar
PRESTON HESTER JR.
  • MEMBER
  • 1 POST
i'm sorry but i know very littler about vehicles. where do i find the MAF sensor. thanks
Oct 15, 2010 at 9:29 PM
Avatar
RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Its in the air cleaner


https://images.2carpros.com/forum/automotive_pictures/12900_maf_1.gif

Oct 16, 2010 at 2:29 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.