Why does the engine hesitate under heavy throttle?

Engine hesitation under heavy throttle can be a sign of several issues within the vehicle's engine system. This problem typically arises from one or more of these components: fuel injectors, fuel pump, air intake system, or spark plugs.
Solved By Zoe Cheng

Solved By Zoe Cheng

Zoe Cheng is an expert in the diesel engine and parts. The company Sennoparts is officially authorized by DEUTZ and VOLVO to sell and service original diesel and machinery parts. We also sell high quality replacement parts and offer remote repair assistance service. Our company exports to over 30 countries worldwide and we have partners in Kenya, Philippines and Uganda among others.

Engine hesitation under heavy throttle can be a sign of several issues within the vehicle’s engine system. This problem typically arises from one or more of these components: fuel injectors, fuel pump, air intake system, or spark plugs.

Fuel injectors, like the 095000-5800 or G2SHRE530362 models available on Sennoparts, play an essential role in delivering the correct amount of fuel into the engine. If they’re clogged or malfunctioning, they may not provide enough fuel, causing the engine to hesitate when you press the throttle.

G2S H RE530362 0.445kg
G2S H RE530362 0.445kg

The fuel pump, like model 16600EB30, is responsible for maintaining the right fuel pressure. A failing pump might not generate enough pressure, especially under heavy throttle when demand is high, leading to engine hesitation.

16600EB30 0.59kg (5) 拷贝

Similarly, the air intake system, which includes components like the air filter and Mass Air Flow (MAF) sensor, provides the necessary air for the combustion process. If there’s a blockage or issue with these parts, it can result in an improper air-fuel mixture, causing hesitation.

Spark plugs ignite the air-fuel mixture in the engine. Worn or dirty spark plugs may not generate a strong enough spark, leading to incomplete combustion and engine hesitation.

To resolve this issue, you need to identify the problematic component(s) and replace them. Regular maintenance checks can also help prevent such problems. Remember, using high-quality parts like those found on Sennoparts will ensure the longevity and optimal performance of your vehicle’s engine.

We also suggest you read below posts:

Fuel Injector Parts And Functions : All Things You Should Know

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