Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSACURA20043.5RLREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROLS - ON-VEHICLE ADJUSTMENTSIGNITION TIMINGMDX, 3.2CL & 3.2TL
2004 Acura 3.5RL
MDX, 3.2CL & 3.2TL
2004 Acura 3.5RLSECTION MDX, 3.2CL & 3.2TL
- Start engine and run at 3000 RPM, with no loads and transmission in Park or Neutral, until radiator fan comes on. Allow engine to idle. Ensure idle speed is within specification. See IDLE SPEED under IDLE SPEED & MIXTURE. Connect Honda PGM tester to Data Link Connector (DLC). Select SCS menu option and follow scan tool instructions.
- MDX, connect inductive timing light to test loop, located at No. 1 ignition coil (may be identified with White tape). 3.2CL & 3.2TL connect inductive timing light to No. 1 ignition coil wire. Aim timing light toward pointer on timing belt cover. Red mark on crankshaft pulley should align with pointer on front of engine. See Figure .
- If timing is not as specified (Red mark and pointer are not aligned), replace ECM/PCM. Timing is not adjustable.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.