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1999 FORD F-350

7.3L V8 Power Stroke Diesel•4WD•AUTOMATIC•diesel•turbo
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5-Year Cost of Ownership
$12,698 maintenance + known platform issues
~$2,540/yr · 210¢/mile equivalent · $6,676 maintenance + $3,102 expected platform issues
Compare this engine
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6.7L V8 Power Stroke Diesel
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7.3L V8 Godzilla

Common Problems & Known Issues

The 1999 F-350 with the 7.3L Power Stroke is a workhorse diesel that earns loyalty when maintained, but expect injector issues, transmission cooler failures, and eventual turbo/EBPV problems as miles pile on. The 7.3L is bulletproof compared to later models, but it's not maintenance-free.

Under-valve-cover injector harness failure (UVCH)

Common · high severity
Typical onset: 100,000-180,000 mi
Symptoms: Hard starting, especially cold, Rough idle, white smoke on startup, Oil contamination in electrical connectors under valve covers, Check engine light with injector circuit codes
Fix: Both valve covers come off to replace the injector harnesses and pigtails. Often done with valve cover gaskets at same time. 4-6 hours labor depending on rust and accessibility.
Estimated cost: $800-1,400

Transmission oil cooler line failure in radiator

Common · high severity
Typical onset: 120,000-200,000 mi
Symptoms: Transmission fluid in coolant (strawberry milkshake appearance), Coolant in transmission causing slipping and damage, Overheating or transmission failure if not caught early
Fix: Radiator replacement is mandatory—the cooler lines corrode internally and contaminate both systems. Transmission flush required, sometimes full rebuild if contamination went unnoticed. Radiator swap alone is 3-4 hours; add 15-25 hours if E4OD/4R100 needs rebuild.
Estimated cost: $600-1,000 radiator only, $2,500-4,500 with transmission rebuild

Exhaust back pressure valve (EBPV) and actuator failure

Common · medium severity
Typical onset: 80,000-150,000 mi
Symptoms: Loss of power, black smoke under load, Exhaust brake not functioning, Check engine light with EBPV circuit codes, Valve can stick closed causing severe restriction
Fix: Most techs delete the EBPV and install block-off plates rather than replace, as it provides minimal benefit and is a known failure point. Delete takes 1-2 hours and a simple kit.
Estimated cost: $150-350 for delete, $400-700 for OEM replacement

Turbocharger compressor wheel and pedestal leaks

Occasional · medium severity
Typical onset: 150,000-250,000 mi
Symptoms: Oil leaking from turbo pedestal onto exhaust manifold, Reduced boost pressure, sluggish acceleration, Blue smoke on acceleration, Whistling or grinding noise from turbo
Fix: Pedestal O-rings fail and leak oil; compressor wheel shaft play increases with age. Pedestal reseal is 3-4 hours, turbo replacement/rebuild adds 6-8 hours total with manifold work.
Estimated cost: $400-700 pedestal reseal, $1,200-2,200 turbo rebuild/replacement

Glow plug relay (GPR) clicking/failure

Common · medium severity
Symptoms: Constant clicking from relay under hood, Hard cold starts or no-start in freezing temps, Wait-to-start light stays on or flashes, Burned relay contacts visible on inspection
Fix: The GPR is a known weak point; aftermarket heavy-duty relays are better than Ford OEM. Replacement is 30 minutes, but often done with glow plug harness inspection.
Estimated cost: $150-300

CPS (Camshaft Position Sensor) failure causing no-start

Occasional · high severity
Typical onset: 60,000-140,000 mi
Symptoms: Sudden no-start with no warning, cranks but won't fire, Stalling while driving, then won't restart until cooled, No tachometer signal when cranking
Fix: Located behind the harmonic balancer on front cover; failure leaves you stranded instantly. Replacement requires removing balancer and is tight work. 2-3 hours labor. Smart owners carry a spare in the glovebox.
Estimated cost: $300-500

E4OD/4R100 transmission torque converter and overdrive issues

Occasional · high severity
Typical onset: 140,000-220,000 mi
Symptoms: Shudder or slipping in overdrive (4th gear), Delayed or harsh shifts, especially 2-3, No overdrive engagement on highway, Transmission overheating
Fix: The E4OD/4R100 is marginal for heavy towing; torque converter lockup and overdrive clutches wear. Often needs full rebuild with upgraded components. 15-20 hours labor for R&R and rebuild.
Estimated cost: $2,800-4,200
Owner tips
  • Change fuel filters religiously every 10-15k miles—the 7.3L's Achilles heel is dirty fuel damaging the HEUI injection system
  • Flush coolant every 2 years with proper diesel coolant additive to protect the oil cooler and head gaskets
  • Bypass or monitor the factory trans cooler-in-radiator setup before it grenades your transmission
  • Carry a spare CPS and glow plug relay—both are cheap insurance against being stranded
  • If towing heavy regularly, install an aftermarket transmission cooler and temp gauge
Absolutely buy one used if maintained—the 7.3L Power Stroke is the last truly mechanical diesel Ford made, but budget $2-3k for deferred maintenance catching up and expect transmission work if it's been towing hard.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.

Labor Times — 1999 Ford F-350

514 jobs across 17 categories

body (34)

brakes (44)

cooling (21)

drivetrain (36)

electrical (76)

engine (66)

exhaust (29)

hvac (23)

interior (24)

maintenance (31)

steering (23)

suspension (37)

transmission (42)

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