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2009
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Rough Idle or Engine Misfire

Expert diagnosis and repair solutions for 2009 Ram 1500 Rough Idle or Engine Misfire. Get step-by-step fixes, cost estimates, and professional advice.

Expert Repair Solutions

1
medium$150-$300
Replace faulty spark plugs and ignition coils to resolve misfire issues.
Source: https://www.manahawkinchryslerdodge.net/how-to-fix-a-misfiring-ram-engine

Repair Steps:

  1. Identify the misfiring cylinder using an OBD-II scanner.
  2. Remove the engine cover to access the ignition coils.
  3. Disconnect the electrical connector and remove the ignition coil.
  4. Remove and replace the spark plug.
  5. Install a new ignition coil and reconnect the electrical connector.
  6. Reinstall the engine cover.
2
easy$20-$50
Clean the throttle body to remove carbon buildup and improve idle quality.
Source: https://www.dodgeforum.com/how-tos/a/dodge-ram-2009-present-why-is-my-truck-running-rough-394668

Repair Steps:

  1. Remove the air intake hose from the throttle body.
  2. Spray throttle body cleaner onto a clean cloth.
  3. Wipe the inside of the throttle body to remove carbon deposits.
  4. Reattach the air intake hose.
3
medium$50-$100
Inspect and repair vacuum leaks to resolve rough idle issues.
Source: https://www.ramforum.com/threads/rough-idle-help.149263/

Repair Steps:

  1. Use a smoke machine to detect vacuum leaks in the engine bay.
  2. Inspect hoses and connections for cracks or disconnections.
  3. Replace any damaged hoses or tighten loose connections.
  4. Re-test for leaks to ensure the issue is resolved.
4
mediumFree under warranty or recall
Update PCM software to address rough idle/misfire during engine warm-up.
Source: https://static.nhtsa.gov/odi/tsbs/2025/MC-11013168-0001.pdf

Repair Steps:

  1. Visit a Chrysler dealership to request a PCM software update.
  2. Technician will connect the vehicle to the diagnostic system.
  3. Software update will be applied to the PCM.
  4. Verify the update resolves the rough idle/misfire issue.

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