I have a 2001 F-150 4x4 4 wheel abs brakes 5.4 engine I got all 4 brakes and rotors 4 new tires and alignment my truck pulls to the left told tire dealer to give me a new left tire still pulls left I sometime here a weird noise on the front left side mostly I can here it on the highway could it be the front hub bearing

It is located on the tires (near the brake rotors for the front tires and in the rear end housing for the rear tires). The job of the wheel speed sensor is to constantly monitor and report the rotational speed of each tire to the ABS control module.

Check wheel balance.

Possible bad brake rotors. Either that or something worn like a bushing , ball joint, tie rod.

1. Check to ensure the tyre pressures in both front tires are identical and also that the pressures in both the rear tyres are identical. (You should be running over 32 psi in the tires in that vehicle.) This will not correct the problem but do it anyway .

2. Have the brakes checked on all 4 wheels to ensure there is no binding of the brake pads on brake rotors(discs) when the brake pedal is released.
If , for example, the front brake pads on one side are not fully releasing their grip on the brake rotor when you remove your foot from the brake pedal, the car will tend to drift off centre when driving and especially when you lift off the power.

3. There are suspension and steering issues to check but I cannot offer comment without inspecting the car.

OIL LEAK BIG PROBLEM.COST MONEY TO BUY OIL.AND COST MONEY TO BUY A NEW ENGINE.NEED FIX IT QUICK AS POSSIBLE. HARD LEFT PULL WHILE COULD BE LOW TIRE PRESSURE OR MISMATCH TIRES ONE TIRE BIGGER THAN THE OTHER TIRE.BROKEN OR SAGGING SPRINGS.WHEEL ALIGNMENT IS OFF.FRONT BRAKE DRAGGING.

You actually have two separate problems. The brake pull to the right is indicating the left side brake is not working properly. You will want to remove the left front wheel, collapse the caliper piston and make sure the caliper is floating freely on its mounts.
With the piston collapsed you should be able to slide the caliper inboard and outboard of the rotor. If not, you will want to remove the attachment pins, clean and lubricate the pins. If they are grooved or worn you will have to replace them.
The second issue of the ABS light is indicating the system has detected an electrical sensing or control problem. Take the vehicle to your local Auto Zone or Advance Auto and ask them to scan the vehicle for trouble codes. They will scan it for you at no charge.
Chances are you will find a wheel speed sensor problem at one of the wheels.
Write the codes down and respond back, we can start diagnosing the problem,
Good luck, let me know.
Regards,

I would check your front tires for any defects if there is none noticeable I would get a front end alignment. Most of the time you can tell if you need a alignment if your car pulls to either the right or left while driving. Hope this helps.

Ok, if the wheel bearing assembly was installed incorrectly the wheel would wobble and you would have a disconcerting feeling in the steering wheel. The rotors have to be within factory specs to be turned safely. What I would do is have the rotors checked with a micrometer and replaced.

REAR WHEEL BEARING/ HUB

Removal Procedure

1. Raise the vehicle. Refer to Vehicle Lifting in General Diagnosis.
2. Remove the wheel and the tire. Refer to Tire and Wheel Removal and Installation in Wheels, Tires and Alignment.
   1. Remove and support the brake caliper. Refer to Brake Caliper Replacement (Front) or Brake Caliper Replacement (Rear) in Brakes.
   2. Remove the brake rotor. Refer to Brake Rotor Replacement in Disc Brakes.
   3. Remove the ABS sensor wire connector.
   4. Remove the four bolts from the control arm.
   5. Remove the hub and bearing from the control arm.
   6. Remove the brake shield from the control arm.
   7. Clean the control arm face and the bore before installing the hub and the bearing.
   Installation Procedure
   
   Notice: Refer to Fastener Notice in Service Precautions.
   
   1. Install the brake shield and the hub and the bearing to the control arm with the four bolts. Be careful not to drop the hub and the bearing, as it could be damaged. Reconnect the ABS sensor. Tighten the hub and bearing bolts to 70 Nm (52 ft. lbs.).
   2. Install the brake rotor. Refer to Brake Rotor Replacement in Disc Brakes.
   3. Install the brake caliper. Refer to Brake Caliper Replacement (Front) or Brake Caliper Replacement (Rear) in Disc Brakes.
   4. Install the wheel and the tire. Refer to Tire and Wheel Removal and Installation in Wheels, Tires and Alignment. Tighten the wheel nuts to 140 Nm (100 ft. lbs.).
   5. Lower the vehicle.

Your ABS sensor in the front left wheel is bad, this may also meen your wheel bearing is gone. Jack up that side and put you hands on the top and bottom of tire then shake it. if the tire moves alot you need to replace the wheel bearing.