Failure mode - Ford 7.3L Godzilla Gasoline (Super Duty 2020+, E-Series cutaway 2021+)

Ignition service wear (plugs / coils)

Reliability tier: aggregated - verify before ordering, see /disclosure/

Symptoms

gradual roughness, longer crank, misfire codes at service mileage
coils fail individually with age/heat

Compare with the other causes of the same sign on this engine: hard start, long crank or no-start (2 causes) · misfire, rough idle, hesitation or surging (3 causes)

Root cause

Long-service-interval plugs on a port-injected pushrod V8 plus conventional coil wear - service consumption, not a defect pattern. PFI architecture means no DI intake-valve carbon story on this platform.

Diagnosis

pull plug condition at service mileage; replace as a set on an aged engine
test coils on a miss before replacing hardware in bulk

Fixes

service: plugs + coils as wear parts; keep plug wells sealed ()

ignition - more than one option: 7.3L Godzilla Ignition Coil, 2020-2022 (OEM), 7.3L/6.8L Godzilla Ignition Coil, 2023+ (OEM), 7.3L/6.8L Godzilla Spark Plug (OEM)

Prevalence

common

Parts for this repair run about $120-$200: see them next to the other repairs on this engine in repair costs.