Oil in coolant on your 1999 F53 V10 typically indicates a blown head gasket, cracked head, or engine block issue. Perform diagnostic tests including compression, cooling system pressure, and combustion leak tests to confirm the problem before attempting repairs.
Ford TSB 25-2200 addresses tapping/ticking noise at idle in 2020-2025 F53 V8 engines caused by excessive camshaft and valve tappet wear. This issue may require complete engine replacement under warranty and affects multiple motorhome chassis.
Yes, you're absolutely on the right track - your testing clearly points to a PCM failure in the ground switching circuit for the drivers side coil bank. The fact that you have +12v but no ground pulse during cranking confirms the PCM isn't completing the circuit.
Everything RV owners need to know about the Ford 6.8L Triton V10 engine including common problems and solutions.
Find RV-friendly Ford dealers by looking for commercial/fleet departments, calling ahead about chassis-only service, and checking RV forums for member recommendations.
For misfire codes on cylinders 5 & 7 in your 2001 Ford E350 V-10, start with the most likely causes: spark plugs and ignition coils. Since you already have these parts, install them first as they're the cheapest fix and most common culprits.
Yes, many 2021+ Ford F53 chassis owners report needing spark plug, coil, and wire replacement well before 20,000 miles due to known quality control issues. Early replacement with quality aftermarket parts often resolves misfires and improves performance significantly.
Your story is a perfect cautionary tale about how ignoring gradual performance decline can lead to catastrophic engine failure. The combination of blocked exhaust flow and oil starvation from running 500 miles with severe backpressure absolutely justified your decision to replace rather than rebuild the engine.
Your 2015 Bounder's Ford V10 crate engine symptoms point to incomplete engine installation/tuning issues, not transmission problems. The shop likely hasn't properly completed the crate engine setup.
Injector issues cause misfire and rough running. Diagnose by scan codes and swap test. Clean or replace as needed.
Your 2014 Fleetwood Bounder's V10 random misfire at high RPMs on hills is likely caused by fuel delivery issues under load or remaining ignition components that haven't been replaced yet. The intermittent nature and specific conditions point to fuel pump weakness or injector problems.
Your 1995 F53 460 7.5L is stalling due to a failing ignition control module (ICM). Since you've confirmed the spare ICM fixes the problem, replace the faulty module and carry a spare for peace of mind while traveling.