Rough Idle or Engine Misfire

Expert diagnosis and repair solutions for 2008 Ford F-150 Rough Idle or Engine Misfire. Get step-by-step fixes, cost estimates, and professional advice.

Expert Repair Solutions

medium$200-$400

Replace faulty ignition coils and spark plugs to resolve misfire issues.

Source: https://www.f150forum.com/f4/solved-misfire-problem-282874/

Repair Steps:

Identify and replace all faulty ignition coils
Replace all spark plugs with new ones
Test drive the vehicle to ensure the issue is resolved

medium$100-$200

Address vacuum leaks causing rough idle by inspecting and repairing vacuum lines.

Source: https://www.youtube.com/watch?v=Q3maB7I6Etg

Repair Steps:

Inspect all vacuum lines for cracks or disconnections
Replace or repair any damaged vacuum lines
Listen for hissing sounds indicating leaks and seal them

hard$500-$1000

Check and replace VCT solenoids and cam phasers if timing-related issues are suspected.

Source: https://www.justanswer.com/ford/ncjfg-2008-ford-f150-5-4-3v-triton-rough-idle-will.html

Repair Steps:

Diagnose timing chain and cam phaser functionality
Replace faulty VCT solenoids
Replace cam phasers if necessary
Reassemble and test

easyFree under recall

Utilize recall service to replace the airbox lid if applicable.

Source: https://www.nhtsa.gov/recalls?nhtsaId=08V523000

Repair Steps:

Contact dealer to confirm recall eligibility
Schedule a service appointment
Have the airbox lid replaced by the dealer

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