The 1999 E-350 with the 6.8L V10 Triton is a workhorse van plagued by one catastrophic design flaw: spark plug ejection that can destroy the engine. Beyond that, it's typical heavy-duty Ford—cruise control failures, transmission cooler leaks, and door latch recalls—but the plug issue dominates ownership experience.
Spark Plug Ejection / Cylinder Head Thread Failure
Common · high severity
Typical onset: 60,000-150,000 mi
Symptoms: Sudden loud popping or hissing sound from engine bay, Severe misfire on one cylinder, immediate loss of power, Spark plug blown completely out of head, sometimes through coil pack, Aluminum threads stripped in cylinder head
Fix: Early 2-valve Triton V10s have inadequate spark plug thread depth—only 4 threads engaging vs. 8+ on proper designs. When a plug blows, HeliCoil thread repair (3-5 hours labor per hole) if caught early, or cylinder head removal and TimeSert installation (12-18 hours) if damage is severe. Some engines require complete head replacement. Multiple cylinders can fail over time, turning this into a recurring nightmare.
Estimated cost: $800-1,200 per cylinder with HeliCoil, $3,500-6,000+ for head-off repair or replacement
Complete Engine Failure from Deferred Plug Maintenance
Occasional · high severity
Typical onset: 100,000-200,000 mi
Symptoms: Multiple cylinders misfiring or dead, Catastrophic internal damage—broken pistons, bent rods, Metal shavings in oil from damaged threads working into cylinders, Engine locked up or knocking severely
Fix: When owners ignore the plug ejection issue or run the engine after a blowout, aluminum debris and detonation from misfire destroy pistons, rings, and bearings. Your repair history shows engine rebuilds, short blocks, piston/ring jobs—classic carnage from this design defect. Full rebuild runs 30-50 hours labor; remanufactured long block swap is 18-25 hours. Used engines are risky—same defect waiting.
Estimated cost: $5,000-9,000 for rebuild, $4,500-7,500 for reman long block installed
Transmission Oil Cooler Line Failure / Leaks
Common · medium severity
Typical onset: 80,000-150,000 mi
Symptoms: Transmission fluid leaking at radiator connection points, Fluid dripping from front of vehicle, below radiator area, Low transmission fluid level causing delayed engagement or slipping, Pink or red fluid mixing with coolant if internal cooler ruptures
Fix: Steel cooler lines rust where they connect to the radiator-mounted cooler, especially in salt states. External leaks need line replacement (2-3 hours). Internal cooler failure contaminates both systems—requires radiator replacement, full transmission flush, sometimes torque converter replacement if milkshake got pumped through. The 4R100 behind this V10 doesn't tolerate coolant intrusion.
Estimated cost: $300-600 for lines only, $1,800-3,200 if cooler ruptures internally
Cruise Control Deactivation / Speed Control Failures
Common · low severity
Symptoms: Cruise control won't engage or set speed, Intermittent operation, drops out randomly, Deactivator switch at brake or clutch pedal failing, Speed control servo or cable binding issues
Fix: Multiple recalls hit the speed control system—deactivator switch corrosion, servo failures, wiring issues. Ford issued recall 99V204 for cruise system fires, leading to many deactivated systems. Diagnosis can be tedious (1-2 hours), repairs range from $50 switch replacement to $400+ servo/cable jobs. Many owners just live without cruise rather than chase gremlins.
Estimated cost: $150-600 depending on component
Door Latch Failures
Occasional · medium severity
Typical onset: 100,000+ mi
Symptoms: Door won't latch closed, pops open while driving, Interior door handle doesn't release latch, Door ajar warning light stays on, Side cargo or rear barn doors affected most often
Fix: Recall 01V090 covered front door latches, but cargo and rear doors fail too—plastic pawls break inside the latch mechanism. On vans used commercially, the slider door gets abused and latch wears rapidly. Latch replacement is 1-2 hours per door depending on access. Not a safety crisis like the plug issue, but annoying and can leave you stranded if driver door won't latch.
Estimated cost: $250-450 per door
Transmission Mount Deterioration
Common · low severity
Typical onset: 80,000-140,000 mi
Symptoms: Clunk when shifting from Park to Drive or Reverse, Vibration at idle, especially with AC on, Excessive drivetrain movement visible when accelerating, Transmission sag visible from underneath
Fix: The rubber transmission crossmember mount disintegrates from heat and age—this is a heavy V10 with a cast-iron 4R100 hanging back there. Jack up transmission, replace mount (1.5-2 hours). While you're under there, inspect engine mounts; the V10 tends to crack them too. Cheap fix, but labor access isn't great on loaded vans.
Estimated cost: $200-350
Owner tips
Replace spark plugs EARLY—every 30,000-40,000 mi, not Ford's 100k interval—and use anti-seize plus proper torque spec (27-33 ft-lbs) to prevent ejection. Consider preventive thread insert installation if you're keeping it long-term.
Service the 4R100 transmission every 30,000 mi with Mercon V fluid—these run hot in van duty, especially towing. External cooler addition is smart.
Inspect transmission cooler lines annually in rust-belt states; catch leaks before coolant mixes with ATF and destroys the transmission.
The V10 is thirsty (9-11 mpg loaded) but nearly bulletproof IF you address the plug thread issue—don't let that one design flaw scare you off an otherwise stout engine.
Buy one only if spark plug threads have been addressed with inserts or you're prepared to do it immediately—otherwise you're driving a time bomb that could cost $6k+ when it grenades, but fix that and you've got a 300k-mile workhorse.
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.
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FORD IS RECALLING MODEL YEARS 1995-2003 WINDSTAR, 2000-2003 EXCURSION DIESEL, 1993-1997 AND 1999-2003 F-250 SD THROUGH F-550 SD DIESEL, 1992-2003 E-150 THROUGH E-550, 1995-2002 EXPLORER, 1997 AND 2002 MERCURY MOUNTAINEER, 1995-1997 AND 2001-2003 RANGER, AND 1994 F53 VEHICLES EQUIPPED WITH THE TEXAS INSTRUMENTS SPEED CONTROL DEACTIVATION SWITCH (SCDS). THE SCDS MAY LEAK INTERNALLY AND THEN OVERHEAT, SMOKE, OR BURN.
Consequence: A VEHICLE FIRE COULD OCCUR WITH OR WITHOUT THE ENGINE RUNNING.
Remedy: FORD WILL NOTIFY OWNERS THAT DEALERS WILL INSTALL A FUSED WIRING HARNESS IN LINE WITH THE SCDS. ON 1999-2003 WINDSTAR VEHICLES WITH A LEAKING SCDS, DEALERS WILL ALSO INSPECT THE ABS CONTROL MODULE CONNECTOR AND REPAIR AS NECESSARY. REPAIRS WILL BE COMPLETED FREE OF CHARGE. THE SAFETY RECALL BEGAN ON OCTOBER 27, 2009. OWNERS MAY CONTACT FORD AT 1-888-222-2751.
VEHICLE SPEED CONTROL:CRUISE CONTROL · 08V051000
2008-02-04
FORD IS RECALLING 225,000 MY 1992-2003 ECONOLINE, MY 1993-1995 TAURUS SHO, MY 1992-1998 CROWN VICTORIA, MY 1993 BRONCO, F-SERIES, MY 1995-1997 F-SERIES SUPER DUTY STRIPPED CHASSIS, MY 1992-1998 MERCURY GRAND MARQUIS, AND MY 1992-1995 LINCOLN TOWN CAR VEHICLES. THE AFFECTED VEHICLES WERE PREVIOUSLY REPAIRED USING A WIRING HARNESS THAT IS NOT COMPATIBLE WITH THE VEHICLE CIRCUIT POLARITY.
Consequence: AS A RESULT, THE FUSE IS LOCATED IN THE OUTPUT CIRCUIT RATHER THAN IN THE INTENDED INPUT POWER FEED CIRCUIT, AND MAY NOT OFFER THE INTENDED PROTECTION IN THE EVENT OF AN ELECTRICAL SHORT TO GROUND.
Remedy: DEALERS WILL INSTALL A NEW WIRING HARNESS, OR REPLACE THE MATING ELECTRICAL COMPONENT. THE RECALL BEGAN ON FEBRUARY 18, 2008. OWNERS MAY CONTACT FORD AT 1-800-392-3673.
VEHICLE SPEED CONTROL · 07V336000
2007-08-03 · EA05005
ON CERTAIN PICKUP TRUCKS, PASSENGER VEHICLES, SPORT UTILITY VEHICLES, AND MOTOR HOMES CHASSIS, THE SPEED CONTROL DEACTIVATION SWITCH MAY, UNDER CERTAIN CONDITIONS, LEAK INTERNALLY AND THEN OVERHEAT, SMOKE, OR BURN.
Consequence: THIS COULD RESULT IN AN UNDERHOOD FIRE.
Remedy: DEALERS WILL INSTALL A FUSED WIRING HARNESS. OWNERS OF THE PASSENGER CARS INCLUDED IN THIS CAMPAIGN WILL BE INSTRUCTED TO RETURN THEIR VEHICLES TO THEIR DEALERS TO HAVE THE SPEED CONTROL DEACTIVATION SWITCH DISCONNECTED AS AN INTERIM REPAIR. AS SOON AS REPAIR PARTS ARE AVAILABLE (EXPECTED OCTOBER 2007), OWNERS WILL BE INSTRUCTED TO RETURN TO THE DEALERS FOR INSTALLATION OF A FUSED WIRING HARNESS. THE RECALL BEGAN ON AUGUST 13, 2007, AND MAILING COMPLETED BY SEPTEMBER 19, 2007. OWNERS MAY CONTACT FORD AT 1-888-222-2751.
VEHICLE DESCRIPTION: ON CERTAIN VANS WITH AMBULANCE PREP PACKAGES OR OTHER SEVERE-DUTY APPLICATIONS INVOLVING OPERATION AT OR NEAR THE GROSS VEHICLE WEIGHT WITH FREQUENT TWISTING OF THE VEHICLE BODY, SUCH AS OFF-ROAD, ROUGH ROAD OR SPEED BUMP EVENTS, THE 35 GALLON MID-SHIP FUEL TANK COULD DEVELOP A CRACK WHERE IT CONTACTS THE FRAME CROSS MEMBER. IF THE FUEL TANK CRACKS, FUEL LEAKAGE COULD OCCUR.
Consequence: FUEL LEAKAGE IN THE PRESENCE OF AN IGNITION SOURCE COULD RESULT IN A FIRE.
Remedy: DEALERS WILL INSPECT THE FUEL TANK AND, IF CRACKED, WILL REPLACE THE TANK. INSULATOR PADS WILL BE INSTALLED ON ALL VEHICLES TO REDUCE THE STRESS LEVELS IN THE FUEL TANK. OWNER NOTIFICATION BEGAN APRIL 19, 2001. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT FORD AT 1-800-392-3673.
EQUIPMENT:OTHER:LABELS · 00V284000
2000-09-21
VEHICLE DESCRIPTION: BI-FUEL CNG PICKUP TRUCKS AND BI-FUEL CNG VANS, MODIFIED BY CFI CONTROL SYSTEMS, INC., FAIL TO CONFORM TO THE REQUIREMENTS OF FMVSS NO. 303, "FUEL SYSTEM INTEGRITY OF COMPRESSED NATURAL GAS VEHICLES." THE LABEL AFFIXED TO THE FUEL FILLER DOOR BY THE VEHICLE MODIFIER CONTAINS THE INSPECTION DATE AND EXPIRATION DATE OF THE CNG TANK. HOWEVER, IT DOES NOT CONTAIN THE STATEMENT "SEE INSTRUCTIONS ON THE FUEL CONTAINER FOR INSPECTION AND SERVICE LIFE."
Consequence: THESE VEHICLES DO NOT COMPLY WITH THE REQUIREMENTS.
Remedy: OWNERS WILL BE PROVIDED A LABEL WITH THE REQUIRED STATEMENT, ALONG WITH INSTRUCTIONS FOR AFFIXING THE LABEL AT THE FUEL FILLER DOOR. OWNER NOTIFICATION BEGAN NOVEMBER 2, 2000. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT FORD AT 1-800-392-3673.
WHEELS:LUGS/NUTS/BOLTS/STUDS · 00V115000
2000-04-19
VEHICLE DESCRIPTION: CUTAWAYS AND STRIPPED CHASSIS WITH SINGLE REAR WHEELS. THE LUG NUTS CAN POTENTIALLY BOTTOM OUT ON A SHOULDER ON THE STUDS.
Consequence: IF THIS OCCURS, THERE CAN BE AN INADEQUATE CLAMP LOAD TO ATTACH THE WHEEL TO THE AXLE, RESULTING IN NOISE, DAMAGE TO THE WHEEL AND HUB, OR IN EXTREME CASES, LOSS OF A REAR WHEEL WHILE THE VEHICLE IS BEING DRIVEN.
Remedy: DEALERS WILL REPLACE THE REAR WHEEL ATTACHING STUDS.
LATCHES/LOCKS/LINKAGES:DOORS:LATCH · 99V046000
1999-03-15
VEHICLE DESCRIPTION: UTILITY VANS EQUIPPED WITH THE "60/40" HINGED SIDE CARGO DOORS. THE STRIKERS FOR THE 60/40 DOOR SINGLE LATCH SYSTEM WERE FOUND TO CONTAIN STRESS CRACKS AT THE STRIKER WIRE LOWER STAKE JOINT. STRIKERS WITH STRESS CRACKS MAY NOT MEET THE REQUIREMENTS OF FMVSS NO. 206, "DOOR LOCKS AND DOOR RETENTION COMPONENTS."
Consequence: IN THE EVENT OF A CRASH, THE DOOR STRIKERS MAY NOT HOLD THE DOOR, INCREASING THE RISK OF PERSONAL INJURY OR PROPERTY DAMAGE.
Remedy: DEALERS WILL REPLACE THE DOOR STRIKER.
POWER TRAIN:MANUAL TRANSMISSION · 98V257000
1998-10-14
VEHICLE DESCRIPTION: PICKUP TRUCKS BUILT WITH SINGLE REAR WHEELS AND EQUIPPED WITH 3.55:1 AND 3.73:1 AXLE RATIO. THESE VEHICLES WERE BUILT WITH INCORRECT SPEEDOMETER DRIVEN GEARS, RESULTING IN A LOWER SPEEDOMETER READING THAN THE ACTUAL VEHICLE SPEED BEING DRIVEN.
Consequence: THIS CAN RESULT IN THE VEHICLE BEING DRIVEN AT AN UNSAFE OR ILLEGAL SPEED SHOULD THE DRIVER NOT REALIZE THAT HIS VEHICLE ROAD SPEED IS GREATER THAN THE SPEEDOMETER INDICATION.
Remedy: DEALERS WILL INSTALL THE CORRECT SPEEDOMETER GEAR.
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