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2005
ford f-15021 views

Rough Idle or Engine Misfire

Expert diagnosis and repair solutions for 2005 Ford F-150 Rough Idle or Engine Misfire. Get step-by-step fixes, cost estimates, and professional advice.

Expert Repair Solutions

1
medium$200-$400
Replace all ignition coils to address potential misfires and rough idle issues.
Source: https://www.f150forum.com/f4/solved-misfire-problem-282874/

Repair Steps:

  1. Purchase new ignition coils for all cylinders
  2. Disconnect the battery to ensure safety
  3. Remove the engine cover to access ignition coils
  4. Unplug and remove each old ignition coil
  5. Install new ignition coils and reconnect the battery
2
medium$100-$200
Replace worn spark plugs to improve engine performance and resolve rough idle.
Source: https://www.justanswer.com/ford/11hcs-2005-ford-f150-4-6-v8-idles-rough-shakes-cause.html

Repair Steps:

  1. Purchase new spark plugs compatible with the 2005 Ford F-150
  2. Disconnect the battery
  3. Remove the engine cover
  4. Carefully remove each spark plug using a spark plug socket
  5. Install new spark plugs and reassemble the engine components
3
hard$300-$600
Clean or replace clogged fuel injectors to ensure proper fuel delivery and smooth engine operation.
Source: https://www.f150forum.com/f4/solved-misfire-problem-282874/

Repair Steps:

  1. Use a fuel injector cleaning kit to clean the injectors
  2. If cleaning does not resolve the issue, replace the fuel injectors
  3. Ensure the fuel system is depressurized before starting
  4. Remove the fuel rail and injectors
  5. Install new injectors and reassemble the fuel system
4
hard$100-$300
Inspect and repair faulty wiring from the PCM to the ignition coils, particularly for cylinder 4.
Source: https://www.f150forum.com/f4/solved-misfire-problem-282874/

Repair Steps:

  1. Inspect wiring harness for damage or loose connections
  2. Repair or replace damaged wires
  3. Ensure secure connections to the PCM and ignition coils
  4. Test for continuity and proper signal transmission
5
easyMinimal cost if no new parts are needed
Swap ignition coils between cylinders to diagnose and confirm faulty coils.
Source: https://www.youtube.com/watch?v=U5Z5sfu6xns

Repair Steps:

  1. Identify the cylinder with a suspected faulty coil
  2. Swap the ignition coil with one from a different cylinder
  3. Test drive the vehicle to see if the misfire moves with the coil
  4. Replace the faulty coil if the misfire follows the swap

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