What Causes a Gasoline Engine to Stall When Accelerating?

[EdwardLee]

Gasoline engine stalling when accelerating is typically caused by a dirty or clogged air filter or a dirty throttle body with limited opening. Below is relevant information about gasoline engines: 1. Composition: A gasoline engine is a spark-ignited internal combustion engine that uses gasoline as fuel. It generally adopts a reciprocating piston structure and consists of the engine block, crank-connecting rod mechanism, valve train, fuel supply system, lubrication system, and ignition system. 2. Advantages: Gasoline engines are lightweight, have lower manufacturing costs, produce less noise, and exhibit better cold-start performance. Compared to diesel engines, gasoline engines are lighter, cheaper to manufacture, quieter, and perform better in cold starts, but they have lower thermal efficiency and higher fuel consumption rates.

[LeCorbin]

I've encountered the issue of the engine stalling after refueling, most likely due to a grumpy fuel supply system. Focus on checking if the fuel pump is performing well—that thing sits submerged in the fuel tank and tends to go on strike as it ages. Also, take a look at whether the fuel filter is clogged; if it's too dirty, stepping hard on the gas might cut off the supply. Air getting into the fuel lines or the injectors being gummed up by deposits can also cause trouble. My suggestion is to first try a tank of reliable gasoline. If that doesn’t work, measure the fuel pressure—if it’s below 2.5 kg, get it fixed ASAP before you end up stranded on the road.

[AidenLee]

Ignition system failures are particularly prone to causing stalling. If the spark plugs fail to ignite when you floor the accelerator, the engine will simply give up. First, remove a spark plug to inspect it—evidence includes worn-out electrodes or being completely fouled with carbon deposits. Aging ignition wires leaking electricity are also troublesome; open the hood at night, and if you see blue sparks from the high-tension wires when revving, that's definitive proof. Don’t forget the ignition coil—this component is the most insidious when faulty, working fine when the engine is cold but causing stalling when the throttle is pressed hard on a hot engine.

[StElizabeth]

Electronic system malfunctions are the most troublesome, like when the idle speed control valve gets stuck, the throttle fails to open when accelerating, and the air-fuel mixture goes haywire causing the engine to stall. False alarms from the crankshaft position sensor are also deadly serious, as the ECU receiving wrong signals can directly cut off ignition. Last time I used a diagnostic tool to read the trouble codes, I found the throttle position sensor was the culprit - cleaning off the carbon deposits immediately fixed it. A reminder not to overlook these small sensors; their failures can drive you crazier than major component breakdowns.