What Causes Engine Power Loss?

[Carolyn]

Causes of poor vehicle acceleration are as follows: 1. Carbon buildup: There are three main reasons for poor acceleration - carbon deposits on valves, idle control valves, intake manifolds, combustion chambers, and spark plugs, which may cause engine stalling during idling. 2. Driving in congested areas: Frequent stop-and-go driving in heavy traffic conditions leads to weakened acceleration performance. 3. Poor fuel quality: The most common issue affecting acceleration is using low-quality fuel, which may clog fuel filters and fuel lines, resulting in inadequate fuel supply. 4. Exhaust system malfunction: Typically caused by a broken catalytic converter or blocked exhaust pipe, restricting exhaust flow and reducing engine power. 5. Clutch failure: In manual transmission vehicles, clutch slippage causes engine RPM to increase without corresponding speed gain. Dual-clutch automatic transmissions may experience similar issues.