Ford E-350 Super Duty rough idle and power loss worsening, turbo connection issues noted on Ford E-350 Super Duty

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Ford E-350 Super Duty owners report experiencing rough idle and power loss due to various underlying issues. These include vacuum leaks, which can disrupt the air-fuel mixture and negatively impact engine performance. Additionally, problems with spark plugs or ignition coils may lead to misfires, further contributing to rough idling. A clogged air filter can restrict airflow, causing slow acceleration, while a dirty mass air flow (MAF) sensor can also affect the air-fuel mixture, resulting in similar performance issues. Fuel system problems, such as a clogged fuel filter or malfunctioning fuel pump, can exacerbate slow acceleration and power loss. Furthermore, turbo connection concerns may impact engine performance during acceleration. It is crucial for owners to seek proper diagnosis and maintenance from a qualified mechanic to address these issues and restore optimal performance in their Ford E-350 Super Duty.

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