Ranger 2WD V6-4.0L (2010)
Ignition Coil: Customer Interest
Engine/Ignition - Buzzing Noise From Top Of Engine
TSB 10-5-7
03/29/10
4.0L - BUZZ NOISE - UPPER ENGINE
FORD:
2005-2010 Mustang
2001-2010 Ranger
This article supersedes TSB 09-21-8 to update the vehicle model years and vehicle lines covered.
ISSUE
Some 2005-2010 Mustang and 2001-2010 Ranger vehicles equipped with a 4.0L engine may exhibit a buzz noise from the upper engine at about 1900
RPM under light load acceleration.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
1. Prior to following normal diagnostics, check the fasteners that attach the ignition coil bracket to the intake manifold for proper torque.
a. If the bolts are found torqued under 89 lb-in. (10 N.m), proceed to Step 2.
b. If the bolts are found to be torqued correctly, this procedure does not apply and follow normal diagnostics.
2. Torque both ignition coil bracket to intake manifold bolts to 89 lb-in. (10 N.m). Then tighten an additional 45 degrees.
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
OPERATION
DESCRIPTION
TIME
100507A
2005-2010 Mustang,
0.2 Hr.
2001-2010 Ranger 4.0L:
Torque The Ignition Coil
Bracket Retainers
Following The Service
Procedure (Do Not Use
With Any Other Labor
Operations)
DEALER CODING
CONDITION
BASIC PART NO.
CODE
12257
24
