P0310 on Ford: How to Diagnose & Fix
Cylinder 10 Misfire Detected
1 Ford model · 1 documented issue · 1 critical · $200-$800 repair
P0310 on Ford by model: symptoms, diagnosis and fix
The 2-valve Triton engines (4.6L, 5.4L, 6.8L V10) used in 1997-2008 E-Series vans are notorious for spark plugs ejecting from the cylinder heads. Ford used only 4 threads in the aluminum heads to secure the spark plugs, which is insufficient to withstand combustion pressures. The plug strips the threads and blows out of the head, often taking the ignition coil with it. This can happen without warning and leaves the vehicle running on fewer cylinders. The problem is most common on plugs 4 and 8 (passenger side).
Common Symptoms
- Loud pop followed by engine misfire
- Spark plug found sitting on top of engine or on ground
- Check engine light with misfire codes P0301-P0310
- Loud exhaust noise from engine bay on one cylinder
- Ignition coil damaged or blown off
How to Fix
The standard repair uses a Time-Sert 5553 or Cal-Van 38900 thread repair insert kit to install a steel thread insert in the damaged cylinder head. The repair can be done with the engine in the vehicle. Preventive installation of inserts on all cylinders is recommended when one blows out. Anti-seize should be used on spark plugs but do NOT over-torque — spec is 11 lb-ft.
Sources for this issue (2)
P0310 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0310 mean on a Ford?
P0310 stands for "Cylinder 10 Misfire Detected." Misfires detected specifically in cylinder 10. Applies to V10 and V12 engines. On Ford it is documented across 1 model: E-Series.
What are the most common causes of P0310?
The most common causes of P0310 are: Failed ignition coil, Worn spark plug, Clogged fuel injector, Low compression, Valve train issue. The specific cause varies by vehicle.
How much does it cost to fix P0310 on a Ford?
Published repair estimates on Ford range from $200 to $800 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0310 on a different make?
View P0310 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.