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Rough Idle or Engine Misfire

Expert diagnosis and repair solutions for 2018 Ford F-150 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.f150forum.com/f118/2018-5-0-misfire-550726/

Repair Steps:

  1. Identify misfiring cylinders using diagnostic tools.
  2. Replace spark plugs with OEM or high-quality aftermarket parts.
  3. Swap ignition coils from misfiring cylinders with known good ones to confirm coil issues.
  4. Replace faulty ignition coils.
2
easy$50-$100
Clean the throttle body and mass airflow (MAF) sensor to improve idle quality.
Source: https://www.justanswer.com/ford/on2r5-idle-issues-2018-f150-5-0-no-codes-rough-idle-hit.html

Repair Steps:

  1. Disconnect the battery to reset the ECU.
  2. Remove the air intake hose to access the throttle body.
  3. Use throttle body cleaner to remove carbon deposits.
  4. Clean the MAF sensor with MAF cleaner.
  5. Reassemble and reconnect the battery.
3
medium$100-$200
Inspect and repair vacuum leaks that may cause rough idle.
Source: https://repairpal.com/ford/f-150/2018/rough-idle

Repair Steps:

  1. Use a smoke machine to detect vacuum leaks in the intake system.
  2. Inspect vacuum hoses and connections for cracks or disconnections.
  3. Replace any damaged hoses or fittings.
  4. Re-test the system to ensure leaks are resolved.
4
hardCovered under recall
Address fuel system issues related to high-pressure fuel pump recall.
Source: https://static.nhtsa.gov/odi/rcl/2018/RCLRPT-18V392-4907.PDF

Repair Steps:

  1. Contact a Ford dealership to verify if the vehicle is affected by recall 18V392000.
  2. Schedule an appointment for inspection and replacement of the high-pressure fuel pump.
  3. Ensure all related components are checked and replaced as necessary.
5
medium$100-$200
Reprogram the PCM to address misfire codes and improve engine performance.
Source: https://static.nhtsa.gov/odi/tsbs/2019/MC-10169890-0001.pdf

Repair Steps:

  1. Visit a Ford dealership or qualified mechanic with access to Ford's diagnostic tools.
  2. Reprogram the Powertrain Control Module (PCM) with the latest software update.
  3. Verify the update resolves the misfire codes and improves engine performance.

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