The 2000 E-350 with the 6.8L V10 Triton is a workhorse van plagued by catastrophic spark plug ejection issues and transmission cooler failures that can destroy the 4R100 transmission if ignored. These are serious, expensive problems that define ownership of this generation.
Spark Plug Ejection and Thread Failure
Common · high severityTypical onset: 60,000-150,000 mi
Symptoms: Sudden loss of power with loud popping or hissing sound, Misfire codes (P0301-P0310), Visible spark plug blown out of cylinder head, Rough idle that wasn't there before
Fix: The two-piece spark plug design and inadequate thread engagement in the aluminum heads cause plugs to blow out under compression. Requires Heli-Coil or Time-Sert thread repair per cylinder (2-3 hours each), sometimes full head removal if damage is severe (12-16 hours). Some shops preemptively install inserts in all cylinders during plug changes. If caught early, single-cylinder repair runs 3-4 hours.
Estimated cost: $800-1,200 per cylinder, $4,000-6,000 for preventive all-cylinder inserts with head removal
Transmission Oil Cooler Line Failure and 4R100 Damage
Common · high severityTypical onset: 80,000-140,000 mi
Symptoms: Transmission fluid in coolant or coolant in transmission (strawberry milkshake fluid), Erratic shifting or slipping after coolant contamination, External cooler line leaks at crimped fittings, Overheating transmission
Fix: The factory cooler lines rot from inside-out and the internal radiator cooler can fail, allowing cross-contamination that destroys the 4R100. Requires immediate cooler line replacement (2-3 hours), external cooler addition, and full fluid flush. If contamination occurred, transmission rebuild or replacement is mandatory (12-18 hours). This is THE killer of these transmissions.
Estimated cost: $400-700 for lines only, $2,800-4,500 for rebuild after contamination
Intake Manifold and Coolant Crossover Leaks
Common · medium severityTypical onset: 70,000-130,000 mi
Symptoms: Coolant seepage at front of engine between cylinder banks, Sweet smell from engine bay, Slow coolant loss with no visible external leak, White residue on valley area of engine
Fix: The plastic crossover coolant tube under the intake manifold cracks, and intake gaskets fail. Requires upper intake removal to access (6-8 hours). Replace crossover, all intake gaskets, thermostat housing while in there. Not a roadside breakdown but leads to overheating if neglected.
Estimated cost: $900-1,400
Fuel Pump Driver Module Failure
Occasional · high severityTypical onset: 90,000-160,000 mi
Symptoms: No-start condition, crank but won't fire, Intermittent stalling, especially when hot, Fuel pump runs constantly or not at all, Check engine light with fuel system codes
Fix: The fuel pump driver module (mounted on frame rail near tank) overheats and fails, cutting power to pump. Simple part replacement (0.8-1.2 hours) but difficult to diagnose if you don't know the quirk. Extended cranking kills the pump eventually, so replace both together if pump is original.
Estimated cost: $250-450 module only, $800-1,200 with pump
Front Suspension Ball Joint and Tie Rod Wear
Common · medium severityTypical onset: 80,000-120,000 mi
Symptoms: Clunking over bumps from front end, Wandering steering or vague on-center feel, Uneven tire wear on front, Play in steering wheel
Fix: The Twin I-Beam front suspension eats ball joints and tie rods, especially on loaded vans. Both upper and lower ball joints should be done together (4-5 hours for both sides), tie rods add another 2 hours. Alignment mandatory afterward. Not sudden failure but safety-critical when loose.
Estimated cost: $800-1,400 for full front end refresh
DPFE Sensor and EGR System Issues
Occasional · low severityTypical onset: 60,000-110,000 mi
Symptoms: Check engine light with P0401 or P0402 codes, Rough idle when warm, Failed emissions test, Surging at steady cruise
Fix: The DPFE (Delta Pressure Feedback EGR) sensor fails frequently, throwing EGR codes. It's a $60 part, 0.5 hours to replace on firewall. Sometimes the EGR valve itself is carboned up and needs cleaning or replacement (1.5 hours). Annoying but not a breakdown risk.
Estimated cost: $150-300 sensor, $350-550 with valve
Cruise Control Deactivator Switch Failure (Recall Related)
Occasional · medium severitySymptoms: Cruise control won't engage or drops out randomly, Brake lights stay on or don't work properly, Speed control inoperative, Fluid leak under dash near brake pedal
Fix: Multiple recalls issued for speed control deactivator switch that can overheat or leak. If not already done, verify recall completion. Switch replacement is 1-1.5 hours. Not driving-critical but can cause electrical issues and brake light problems that fail inspection.
Estimated cost: $200-350 if not covered by recall
Buy only if you need the V10's towing capacity and can budget for the spark plug and transmission cooler time bombs — these are $3k-5k problems waiting to happen, not 'ifs' but 'whens'.
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.