Service Bulletin

16-008

September 04, 2024

Version 14

High Pressure Fuel Pump Chirps
Supersedes 16-008, dated September 01, 2018, to revise the information highlighted in yellow.
AFFECTED VEHICLES
Year

Model

Trim

VIN range

2014–17

MDX

ALL

ALL

2015–17

TLX

ALL with V6

ALL

2014–17

RLX

ALL

ALL

2014 and 2016–17

RLX Hybrid

ALL

ALL

REVISION SUMMARY
Under AFFECTED VEHICLES, information in the table was updated.
SYMPTOM
The high pressure fuel pump area chirps after the engine is warm.
POSSIBLE CAUSES
The high pressure fuel pump is making a chirp.
NOTE: This noise does not impact the pump, engine function, or reliability.
CORRECTIVE ACTION
Replace the high pressure fuel pump.
PARTS INFORMATION
Part Name

Part Number

Quantity

Fuel Joint Pipe Set

16012-R9P-315

1

High Pressure Fuel Pump

16790-5J6-305

1

Retainer

17711-S0X-931

1

Intake Manifold Gasket (top)

17112-5G0-A01

1

Intake Manifold Gasket

17105-R9P-A01

1

Intake Manifold Base Gasket (RR)

17065-R9P-A01

1

Intake Manifold Base Gasket (FR)

17055-R9P-A01

1

CLIENT INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment,
and training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you should not
assume this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies, contact
an authorized Acura automobile dealer.

© 2024 American Honda Motor Co., Inc. – All Rights Reserved

Page 1 of 7

WARRANTY CLAIM INFORMATION
The normal warranty applies.
Operation
Number

Description

Flat Rate
Time

Defec
t

Symptom
Code

Template ID

Failed Part Number

1211U6

Replace the high
pressure
fuel
pump (MDX).

1.8 hrs

03214

04201

16-008N

16790-5J6-305

1211FG

Replace the high
pressure
fuel
pump (TLX).

1.9 hrs

03214

04201

16-008P

16790-5J6-305

1211U6

Replace the high
pressure
fuel
pump (RLX).

1.7 hrs

03214

04201

16-008Q

16790-5J6-305

1211U6

Replace the high
pressure
fuel
pump
(RLX
Hybrid).
Repair Technician

1.7 hrs

03214

04201

16-008R

16790-5J6-305

Skill Level:
DIAGNOSIS

With the hood open, listen for a chirping with the engine warmed up.

•
•

If the noise is coming from the high pressure fuel pump, go to REPAIR PROCEDURE.
If the noise is NOT coming from the high pressure fuel pump, continue with normal troubleshooting.

REPAIR PROCEDURE
1. Relieve the fuel pressure. See service information.
2. Set the No. 1 piston at top dead center (TDC). See service information.
3. Remove the intake manifold and intake manifold base. See service information.

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4. Remove the high pressure fuel pump cover.

5. Remove the quick-connect fitting cover.

6. Disconnect the quick connect fitting.
7. Remove the fuel joint pipe.

Page 3 of 7

8. Disconnect the high pressure fuel pump connector.

9. Remove the bolts by loosening them alternately, then remove the high pressure fuel pump and the roller.
10. Rotate the crankshaft and check the high pressure fuel pump cam for pits, scores, and excessive wear. If needed,
replace the rear camshaft.

11. Set the No. 1 piston at top dead center (TDC).
12. Install the roller onto the high pressure fuel pump cam.

13. Set the gauge on the roller and hold it, then set the dial to zero.
14. Rotate the crankshaft 720° and measure the three cam lobes height. If the cam lobes are excessively worn,
replacethe rear camshaft.
NOTE: The high pressure fuel pump cam has three cam lobes. Cam Lobe Height Standard (New): 0.236 in (6.0 mm)
Page 4 of 7

15. Set the No. 1 piston at top dead center (TDC).
16. Check the position of the cam that drives the high pressure fuel pump as shown.

17. Coat the roller, O-ring, cam and around the bore of the lifter with clean engine oil.

18. Install the roller and the high pressure fuel pump. Install the bolts loosely by hand in an alternate pattern. Connect
the connector.
NOTE: Failure to install a new fuel joint pipe will cause fuel leaks.
19. Lubricate the top of the new fuel joint pipe and the threaded area of the fuel rails and the high pressure fuel pump
with polyethylene glycol included in the new fuel joint pipe kit.
NOTE: Do not reuse the fuel joint pipe.

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20. Tighten the fuel joint pipe nuts by hand until the end of the joint pipe is seated on the fuel rails and high
pressurefuel pump.

21. Set the fuel joint pipe bracket on the cylinder head and loosely install the bolts.
22. Tighten the high pressure fuel pump mounting bolts to the specified torque.

23. Tighten the fuel joint pipe bracket mounting bolts and the fuel joint pipe nuts to the specified torque in the
numbered sequence shown.
NOTE:
• A crowfoot-type special tool increases the torque applied by the torque wrench. Search Torque
Specifications on the iN for details on how to recalculate the torque wrench setting.
• Failure to tighten the fuel joint pipe nuts to the proper torque will cause a fuel leak.
24. Connect the quick-connect fitting and install the quick-connect fitting cover.
25. Set the power mode to ON, but do not start the engine. After the fuel pump runs for about two seconds, the fuel
linewill be pressurized. Repeat this two or three times, then check for fuel leakage.

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26. Install the high pressure fuel pump cover and torque it to 12 N·m (9 lb-ft).

27. Install the intake base and intake manifold.

Page 7 of 7