Ignition & Fuel Delivery - Fuel, Air & Emission Symptoms
Common symptoms and diagnostic guides.
Car feels rough during city driving
Rough performance during city driving often stems from unstable engine combustion, fuel delivery, or transmission control issues at low speeds. Early detection prevents further damage.
Engine feels less refined
An engine that feels less refined (rough idle) often signals issues with ignition, fueling, air intake, or sensors disrupting smooth combustion and performance.