TI
About Blog Reference VIN lookup Disclosure
← Power loss / limp mode on all engines

Symptoms · 3.5 EcoBoost (gas)

3.5 EcoBoost (gas): loss of power, limp mode or derate

5 documented failures on this engine list this among their signs. They are ordered from the most widespread down. Each one shows the signs in its record's own words, how to tell it from the others, the usual fix and any recall or bulletin.

  1. Charge-air-cooler condensation: boost shudder / hesitation in humid weather Very common · 169 complaints
  2. Ignition misfires: spark plugs and COP coils Very common · 84 complaints · 3 recall/bulletins
  3. Turbo / wastegate / boost-control faults Occasional · 13 complaints · 5 recall/bulletins
  4. Low-pressure fuel delivery (in-tank pump / pressure faults) Occasional · 3 complaints · 1 recall/bulletin
  5. High-pressure fuel pump (GDI) failures Occasional · 1 complaints

Not sure which engine you have, or want the recalls for your exact truck? Check your VIN: it names the engine and lists the campaigns for that model year. Whether a recall is still open on your VIN: nhtsa.gov/recalls.

1 Charge-air-cooler condensation: boost shudder / hesitation in humid weather
aggregated How widespread: Very common 169 NHTSA owner complaints match it, out of 667 checked

How it shows up

  • intermittent misfire / limp behavior that clears after the intake dries out
Its other signs
  • brief shudder / bucking under moderate acceleration in humid or rainy weather
  • hesitation or stumble on tip-in after extended light-throttle cruising
  • smoke puff or moisture from the exhaust on hard acceleration

How to tell it apart

  • reproduce on a humid day after light-throttle cruising: sustained moderate load, watch for the characteristic single shudder event
  • check for stored multi-cylinder misfire DTCs (P0300-P0306) without an ignition or fuel cause
  • inspect CAC for pooling; verify the deflector position / updated CAC hardware

Usual fix

Ford service direction: relocate the CAC air deflector (or updated CAC assembly) so airflow evaporates pooled condensate; owner practice: periodically run sustained boost to purge the cooler

Root cause, parts and sources →

2 Ignition misfires: spark plugs and COP coils
aggregated How widespread: Very common 84 NHTSA owner complaints match it, out of 667 checked

How it shows up

  • lack of power on the high-output tune (2019 Limited TSB case)
Its other signs
  • MIL with misfire DTCs P0300-P0306
  • rough idle and flashing MIL under load
  • hard start after misfire events

How to tell it apart

  • read misfire DTCs and freeze frames; identify the cylinder pattern
  • swap-test the coil on the misfiring cylinder; inspect the plug for gap/erosion
  • check for CAC-condensation events (multi-cylinder, humid-weather single event) before condemning ignition parts

Usual fix

full set of plugs (turbo service interval, not the NA interval) plus the failed coil(s); boot/inspect on every cylinder

Recalls and bulletins

SSM 50412TSB 19-2286TSB-14-0160

Root cause, parts and sources →

3 Turbo / wastegate / boost-control faults
aggregated How widespread: Occasional 13 NHTSA owner complaints match it, out of 667 checked

How it shows up

  • loss of power / failsafe boost
Its other signs
  • MIL with boost-pressure DTCs (P0236/P0238/P0299/P025E/P007D family)
  • wastegate rattle at idle or on shutdown
  • turbo whine or oil traces at the charge pipes

How to tell it apart

  • scan boost DTCs and desired-vs-actual boost PIDs under load
  • smoke-test the charge system (pipes, CAC, clamps) before condemning a turbo
  • listen for wastegate rattle vs phaser/chain noise

Usual fix

charge-system leak repair first (pipes/clamps/CAC), then wastegate actuator / boost sensor; turbo replacement for confirmed bearing/oil-flood cases

Recalls and bulletins

23B65TSB 22-219822U0815-0071TSB-13-6-12

Root cause, parts and sources →

4 Low-pressure fuel delivery (in-tank pump / pressure faults)
aggregated How widespread: Occasional 3 NHTSA owner complaints match it, out of 667 checked

How it shows up

  • power loss under load from fuel starvation
Its other signs
  • no-start / extended crank, more pronounced cold
  • MIL with P0087-family codes

How to tell it apart

  • log low-side fuel pressure at rail inlet, cold and hot
  • verify pump power/ground and the filter state before pump replacement
  • apply the cold-weather bulletin triage below -15C before parts

Usual fix

in-tank pump module / filter service; wiring correction where the fault is electrical

Recalls and bulletins

TSB-14-0067

Root cause, parts and sources →

5 High-pressure fuel pump (GDI) failures
aggregated How widespread: Occasional 1 NHTSA owner complaints match it, out of 667 checked

How it shows up

  • sudden power loss in motion
Its other signs
  • long crank on start-up
  • random misfires / hiccups under acceleration
  • MIL with fuel-pressure DTCs (P0087 family)

How to tell it apart

  • log fuel rail pressure desired vs actual on a hot restart and under load
  • check for P0087/P0088 and for metal on the HPFP follower path (oil analysis)
  • rule out the in-tank pump and filter before the HPFP

Usual fix

HPFP replacement with the full fuel-contamination procedure (flush/rails/injector inspection) when the pump failed internally

Root cause, parts and sources →

Other symptoms on the 3.5 EcoBoost (gas)

Hard start, long crank or no-startLosing coolantOverheating or temperature creeping upOil leak, oil consumption or rising oil levelTicking, knocking, rattle or whineMisfire, rough idle, hesitation or surging

Everything on the 3.5 EcoBoost (gas)Its recalls and bulletins

Order: how widespread each failure is in its record (near-universal, very common, common, occasional, rare), then the number of NHTSA owner complaints that match its keywords. Complaint counts are keyword matches, not a manual review of each complaint. A symptom listed here means the failure is documented with that sign; it is not a diagnosis of your truck. Tiers: verified, aggregated, contested, data-gap. How we tier and source facts.