The 2005 Expedition fuel system has two main killers: electronic throttle failure and fuel injector breakdown.
Throttle failures are the most common complaint. Engine shuts down at any speed—35 mph, 60 mph, even in parking lots—with a dashboard warning that says "CHECK ELECTRONIC THROTTLE CONTROL." The vehicle goes dead, the driver coasts to the shoulder, turns the key off and back on, and it runs fine until it happens again. Some owners see this five times in a month; others deal with it recurring over years. Dealers replace the Throttle Position Sensor for $75–$340, but the shutdowns continue. The real fix is a $600–$800 throttle body replacement, and at least one owner had his replaced twice. Owners can find no diagnostic codes when dealers check, making troubleshooting impossible.
Fuel injectors freeze open, dumping fuel into the engine and exhaust. Smell becomes overwhelming, the engine runs rough, and spark plugs can break inside the cylinder head. Ford extended the warranty to 120,000 miles for injectors and sent notification letters, but only replaces injectors as they fail—not all of them upfront—leaving owners with a ticking time bomb of faulty injectors still in the engine.
Fuel pump control modules corrode from moisture exposure, disabling the pump without warning. Loss of power happens on highways at highway speed. One owner lost power steering on a steep grade and had to use the emergency brake to stop.
Fuel tank filling problems affect some vehicles; vapor vent hoses freeze, making fill-ups take 25 minutes with gasoline backing up out of the nozzle. Repair requires dropping the fuel tank.
Owners consistently note that Ford knows about these problems but will not issue recalls.
Failure modes owners describe
Electronic Throttle Body Failure
Engine shuts down or loses power without warning; dashboard displays 'CHECK ELECTRONIC THROTTLE CONTROL' or 'ENGINE FAILSAFE MODE.' Vehicle can be restarted after a few minutes and runs normally until the next occurrence. Happens repeatedly over time at various speeds and driving conditions.
When: Most common between 35K–120K miles; reported starting as early as 3 days after purchase and recurring monthly or weekly thereafter
Symptoms owners cite: Complete loss of engine power while driving; Loss of acceleration ability; vehicle feels like it's in neutral when pressing gas pedal; Dashboard warning message: 'CHECK ELECTRONIC THROTTLE CONTROL' or 'ENGINE FAILSAFE MODE'; Vehicle can be restarted after turning ignition off and waiting several minutes; Occurs without prior warning at any speed (10–60+ mph)
Codes mentioned: CHECK ELECTRONIC THROTTLE CONTROL, ENGINE FAILSAFE MODE
Repairs/costs cited: Throttle Position Sensor (TPS) replacement ($75–$340) does not resolve the issue. Throttle body replacement ($600–$800 parts, plus labor) is the stated fix. One owner reports throttle body replaced twice. Multiple owners report dealers cannot pinpoint root cause or find diagnostic codes.
Recalls/TSBs owners mention: Ford extended warranty on fuel injectors to 120,000 miles (per owner #2). Owners report being told at 49,000 miles that part failure is 'not unusual.' No recall issued despite widespread reports. Service bulletins not provided.
Fuel Injector Failure
Fuel injectors freeze open or fail, causing excessive fuel to enter the engine and exhaust system. Engine runs rough, difficult to start, and produces strong fuel smell. Can lead to spark plug damage, catalytic converter failure, and engine shutdown.
When: Reported as early as 1 month after purchase; multiple failures within 16–24 months; one case at 35K miles, others at 60K–74K miles
Symptoms owners cite: Engine runs rough and difficult to start; Strong smell of fuel in cabin and exhaust; Jerking or continuous shaking of vehicle; Cloudy fumes from exhaust pipe; Engine stalls or shuts down; Exhaust produces heavy gasoline smell
Repairs/costs cited: Replacement cost not cited in narratives. Owners report multiple injectors failing: two replaced early, but vehicle still has 6 faulty injectors remaining. One owner had to replace 3 injectors at once (35K miles) and catalytic converter was destroyed as a result ($cost not specified). Another owner replaced 2 injectors in 16 months and reports the smell is 'never ending.'
Recalls/TSBs owners mention: Ford extended warranty to 120,000 miles on defective fuel injectors and sent letters to affected owners (per owner #2). However, Ford only replaces injectors as they fail, not proactively. Owner #3 lost extended warranty coverage after taking vehicle to non-Ford mechanic. Owners characterize Ford's response as insufficient given known defect.
Fuel Pump Control Module (FPCM) Corrosion and Failure
Fuel pump control module corrodes from moisture exposure, with visible holes in the circuit board. Module shorts out, disabling fuel pump and causing engine stall. New module has redesigned housing to prevent recurrence.
When: Reported at 60K–103K miles; one case after approximately 1 year of intermittent stalling prior to complete failure
Symptoms owners cite: Engine stalls or shuts down without warning; Vehicle will not restart; Loss of electrical power to fuel pump; No fuel reaching engine; Complete loss of power while driving
Repairs/costs cited: FPCM replacement required; cost not specified. One owner reports mechanic found module 'completely corroded from behind' with 'circuit board exposed to moisture.' New FPCM installed was 'obviously redesigned' to prevent moisture damage. Owner notes replacement parts were on back order; one dealer quoted 3-month wait for fuel pump and stated no aftermarket option exists for 2005 model.
Recalls/TSBs owners mention: No manufacturer response mentioned. Owner notes finding 'alarming amount of complaints on the internet' of similar problems.
Fuel Tank Filler Neck / Vapor Canister Blockage
Fuel tank difficult or impossible to fill; gasoline backs up out of nozzle. Cause traced to vapor vent hose that redirects fumes away from fill tube; hose freezes or clogs, preventing tank ventilation. Repair requires fuel tank removal.
When: Reported at 60K miles; no timing pattern in narratives
Symptoms owners cite: Fuel tank takes 20–25 minutes to fill; gasoline backs up out of nozzle; Requires holding nozzle away from opening and spraying gas at tank at an angle; Extremely difficult to fuel vehicle
Repairs/costs cited: Ford proposes dropping fuel tank ($500–$600) to inspect or replace vapor vent hose or 'replaceable filter' supposedly located above fuel tank. One owner disputes this design and questions whether a replaceable filter would actually be located above the fuel tank. Another owner reports 20 minutes to fill and potential fire risk from fuel spraying backward.
Recalls/TSBs owners mention: Ford acknowledges vapor vent hose was installed as part of an emissions/lawsuit settlement and blames EPA requirements. Service managers admit other Expeditions have the same problem but offer no permanent solution.
Throttle Position Sensor (TPS) Intermittent Malfunction
TPS sensor fails intermittently, causing throttle control loss and engine shutdown. Replacement does not always resolve the underlying throttle body issue.
When: Reported at various mileages; one case at low miles, others at 49K–66K miles
Symptoms owners cite: CHECK ELECTRONIC THROTTLE CONTROL warning appears; Loss of throttle response; Engine stalls or shuts down
Codes mentioned: Throttle Position Sensor malfunction
Repairs/costs cited: TPS replacement cost $75–$340. However, owners report stalling continues after TPS replacement; next step often requires throttle body replacement. One case involved TPS replacement followed by throttle body and fuel injector service.
Recalls/TSBs owners mention: None specified beyond replacement recommendation.
Spark Plug Failure Related to Fuel Injector Malfunction
When fuel injectors fail and flood engine with excess fuel, spark plugs can break or become damaged. One case documents two spark plugs breaking off into cylinder head.
When: Occurs concurrent with fuel injector failure; one case at low to moderate mileage
Symptoms owners cite: Spark plugs break or detach; Engine damage secondary to fuel injector flooding
Repairs/costs cited: Repair cost for two broken spark plugs and removal of broken pieces: $800 (plus $150 van rental while truck was in shop).
Recalls/TSBs owners mention: None specified.
Unintended Acceleration or Throttle Surge
Engine revs up unexpectedly without driver input; vehicle accelerates suddenly from idle or normal speed.
When: Reported at least once at 50 mph; frequency unclear
Symptoms owners cite: Motor revs up with no apparent cause; Sudden acceleration while driving at normal speed; Driver must apply hard brake pressure to prevent collision
Repairs/costs cited: Owner reported problem to dealer on three separate occasions; dealer advises 'nothing wrong with the vehicle.' No repair attempted or completed.
Recalls/TSBs owners mention: Dealer denies defect; no further action taken.
Synthesized from 41 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.