F 150 2WD Lightning V8-5.4L SOHC SC VIN 3 (2001)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Seats (SIR) - Vibration or Shake at Idle
Article No.
01-24-8
12/10/01
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TRIM - SEATS - SEAT VIBRATION OR SHAKE AT
IDLE IN GEAR - VEHICLES EQUIPPED WITH 4.6L
OR 5.4L ENGINE ONLY
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DRIVEABILITY - IDLE - SEAT VIBRATION OR
SHAKE AT IDLE IN GEAR - VEHICLES EQUIPPED
WITH 4.6L OR 5.4L ENGINE ONLY
FORD:
2001 F-150
ISSUE
Some vehicles equipped with (Seat Integrated Restraint) "SIR" seats may exhibit a seat vibration or shake while at idle in gear. This may be caused by a
combination of engine idle speed, motor mount material and the need to neutralize the Powertrain system.
ACTION
Verify the condition. Reprogram the Powertrain Control Module (PCM) to raise the base idle speed, replace engine mounts (vehicles produced 11/1/00
through 5/1/01 only) with a softer design mount and perform the Powertrain Neutralize Procedure to help reduce the amount of energy transferred from
the engine block to the seats.
SERVICE PROCEDURE
Reprogram the PCM with a new calibration to increase base idle speed. Refer to the PCM Information Chart.
On vehicles built 11/1/00 through 5/1/01 only, also replace Engine Mounts. Install the following engine mount service parts (Left Hand XL7Z-6038-CA,
Right Hand XL7Z-6038-AA). Follow the procedure in the 2001 Work Shop Manual, Section 303-01
Perform Powertrain Neutralize Procedure:
To neutralize the exhaust, transmission and engine mounts, perform the following procedure:
1.
Loosen the following components:
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Transmission mount nuts to cross member
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Passenger's side engine mount to frame
