Diagnostics & Repair

Volkswagen Jetta EPC Light & Misfire Fixed! Walnut Blasting & Coil Pack Install

What started as a simple spark plug and filter tune-up turned into a full diagnostic project! In this video, we tackle a random misfire and EPC light on a 2017 Volkswagen Jetta 1.4L TSI with over 200,000 km.

Follow along as we walk through removing the intake manifold, walnut blasting heavy carbon buildup off the valves, replacing the fuel injectors, and ultimately replacing the ignition coils to permanently fix the issue.

Timestamps

00:00 Intro & Symptoms (Random Misfire & EPC Light)
00:30 Teardown: Manifold, Coolant & Vacuum Line Removal
02:10 Intake Valve Carbon Cleaning (Walnut Blaster)
03:16 Fuel Injector Replacement
04:50 Reassembly & Inspection
07:01 Misfire Returns: Installing New Bosch Ignition Coils
08:02 Final Diagnosis & 3,000 km Update

Repairs & Maintenance Performed

Intake manifold removal
Walnut shell blasting / carbon cleaning (Cylinder 2 was the worst)
Fuel injector replacement
Bosch ignition coil pack installation & ground repair

Found this helpful? There's more where that came from.

If you hit a similar misfire on your TSI engine, drop a comment on YouTube — and subscribe so you don't miss the next fix.

▶ Subscribe on YouTube