Gen 2 3.5L EcoBoost Cylinder Misfire

[fordraptorfun]

Need some help with an intermittent misfiring problem.

2019 with 66,121 miles. 100% stock powertrain.

Code: P0025 - B Camshaft Position Timing - Over-Retarded (Bank 2)
Code: P0300 - Random Misfire Detected
Code: P0304 - Cylinder 4 Misfire Detected
Code: P0305 - Cylinder 5 Misfire Detected
Code: P0305 - Cylinder 5 Misfire Detected

Intermittent, truck drives fine for a few hundred miles the shakes when misfires occur + blinking Check Engine Light.

The intermittent behavior, new plugs, and multiple cylinders leads me to believe connector or harness, any thoughts or recommendations? @FordTechOne

Background:

@64,208 miles I had all 6 plugs replaced and Qty 1 Direct Fuel injector replaced.

misfires on cylinders 1, 2, & 3 with codes P0301, P0302, and P0303. However, those misfires were NOT intermittent, they were persistent.

These are the parts that were replaced at 64,208 miles.

 

[Nex]

Look for loose connections. You can swap the coils to see if the misfire moves.

 

[TwizzleStix]

Bad gas. You feed it tacos & buritos?

 

[blwn]

I'd focus on the P0025 code first. Oil level full? Changed recently? Ever had phasers replaced?

SSM 48423 - 2015-2020 Various Vehicles - Illuminated Malfunction Indicator Lamp (MIL) With Variable Cam Timing (VCT) DTCs - Diagnostic Information

Some 2015-2020 Ford and Lincoln vehicles may exhibit an illuminated MIL with diagnostic trouble codes (DTCs) P0011, P0012, P0014, P0015, P0016, P0017, P0018, P0019, P0021, P0022, P0024 and/or P0025. This may be due to small debris causing the VCT solenoid to stick. Before attempting any component diagnosis or replacement of the VCT solenoid, refer to Powertrain Control and Emissions Diagnosis (PC/ED) pinpoint test HK11 to cycle the affected VCT solenoid 10 times to attempt to clear the debris.

 

[smgilles]

Need some help with an intermittent misfiring problem.

2019 with 66,121 miles. 100% stock powertrain.

Code: P0025 - B Camshaft Position Timing - Over-Retarded (Bank 2)
Code: P0300 - Random Misfire Detected
Code: P0304 - Cylinder 4 Misfire Detected
Code: P0305 - Cylinder 5 Misfire Detected
Code: P0305 - Cylinder 5 Misfire Detected

Intermittent, truck drives fine for a few hundred miles the shakes when misfires occur + blinking Check Engine Light.

The intermittent behavior, new plugs, and multiple cylinders leads me to believe connector or harness, any thoughts or recommendations? @FordTechOne

Background:

@64,208 miles I had all 6 plugs replaced and Qty 1 Direct Fuel injector replaced.

misfires on cylinders 1, 2, & 3 with codes P0301, P0302, and P0303. However, those misfires were NOT intermittent, they were persistent.

These are the parts that were replaced at 64,208 miles.

View attachment 438225

Did some one drop the box of spark plugs prior to putting them in your truck? I’d seriously question if the insulators are cracked vs the coil packs are not on securely. It’s awful suspicious you had the plugs replaced and now having misfires on that many banks.