2008 Mazda CX-9 Accelerator Pedal Vibration
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Some vehicles may exhibit accelerator pedal vibration around 1750-2000 engine RPMs, regardless of speed. The vibration may also be felt at the brake pedal and steering wheel. On vehicles built after February 21, 2008, the No.2 dynamic chamber stay (bracket) was deleted on all production vehicles. The absence of the No.2 stay can cause pedal vibration. This procedure details installation of the No. 2 stay. The No. 2 dynamic chamber stay components required are the stay (1), the top fastener (2) and the bottom fastener (3). Customers having this concern should have their vehicle repaired using the following repair procedure. REPAIR PROCEDURE 1. Verify customer concern. 2. Record customer radio station presets. 3. Remove negative battery cable. 4. Remove engine cover. Refer to Workshop Manual section 01-10 ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7].
Some vehicles may exhibit accelerator pedal vibration around 1750-2000 engine RPMs, regardless of speed. The vibration may also be felt at the brake pedal and steering wheel. On vehicles built after February 21, 2008, the No.2 dynamic chamber stay (bracket) was deleted on all production vehicles. The absence of the No.2 stay can cause pedal vibration. This procedure details installation of the No. 2 stay. The No. 2 dynamic chamber stay components required are the stay (1), the top fastener (2) and the bottom fastener (3). Customers having this concern should have their vehicle repaired using the following repair procedure. REPAIR PROCEDURE 1. Verify customer concern. 2. Record customer radio station presets. 3. Remove negative battery cable. 4. Remove engine cover. Refer to Workshop Manual section 01-10 ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7].
5. Remove the air cleaner
cover and resonance chamber. Disconnect the MAF/IAT sensor connector.
Refer to Workshop Manual section 01-13 INTAKE-AIR SYSTEM REMOVAL /
INSTALLATION [3.7L]. 6. Remove dynamic chamber assembly (upper intake manifold).
Refer to Workshop Manual section 01-13 INTAKE-AIR SYSTEM REMOVAL /
INSTALLATION [3.7L]. a. Remove one 8mm fastener from No.1 stay (just
underneath throttle body) b. Remove three (3) harness clips from dynamic
chamber using body removal
tool (or equivalent). c. Remove six (6) 8mm bolts from dynamic chamber.
NOTE: • When removing dynamic chamber assembly, leave back hose
connected and position out of the way. Remove purge valve from mounting
bracket to provide additional room to work. • 7. Remove two (2) 8mm
bolts (A) and loosen one (1) 8mm bolt (B) from the rear exhaust manifold
insulator (heat shield) as shown.
Refer to Workshop Manual section 01-15 EXHAUST SYSTEM
REMOVAL / INSTALLATION [3.7L]. NOTE: • An inspection mirror may be
helpful to see the bolts. 8. Reposition the heat shield (D) to gain
access for No. 2 stay bottom fastener installation. 9. Install bottom
fastener (C). Start threads but do not tighten the fastener at this
time. NOTE: • Apply Loctite # 272 to bottom fastener threads before
installation. 10. Install the No. 2 stay so that slotted side of the
stay is placed on top of the bottom fastener installed in the previous
step. Do not tighten the fastener at this time. 11. Check that all
dynamic chamber gaskets are in place and mounting surfaces are clean.
12. Place dynamic chamber onto the lower intake manifold. 13. Install
top fastener through the top bolt hole of the No.2 stay but do not
tighten at this time. This will align the No.2 stay properly.
Thanks for sharing the information
ReplyDeleteFor more info : Halt Hass Chamber