Does your diesel car jerk violently when you turn it off? Is the warning light on and the engine running rough? One of the most common culprits for these symptoms is a faulty throttle valve.
Instead of facing a costly replacement, at Digi-Tec / ReproRACE we offer you a definitive, more economical, and completely reliable electronic solution.
The Actual Function of the Throttle in a Diesel Engine
It is essential to understand that the throttle valve in a diesel engine does not work like it does in a gasoline engine.
• In a gasoline engine, the butterfly regulates the air intake to control acceleration.
• In a diesel engine, power is managed by fuel injection. The intake throttle valve also serves other functions, primarily as an anti-shudder valve .
Its main job is to close abruptly just as you turn off the engine. By cutting off the air supply, it causes a smooth, instant, and vibration-free stop. It also helps regulate the operation of the EGR system under certain conditions.
Symptoms of a Bad Intake Throttle
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Violent Jerk When Turning Off the Engine:
This is the clearest symptom. The engine "shudders" or "nods" for several seconds before coming to a complete stop.
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Check Engine Light On:
The ECU detects that the throttle is not responding to its commands and records a fault code (DTC).
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Heater Indicator Flashing:
In many vehicles (especially VAG Group vehicles), this warning light indicates a fault in engine management, often related to the throttle valve.
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Loss of Power:
The vehicle may enter "protection mode" or "limp mode," limiting revs and speed.
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Metallic Noise:
Sometimes you may hear a metallic "click" or "sloshing" coming from the engine, which corresponds to broken plastic gears inside the throttle mechanism.
Benefits of the Software Solution
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Substantial Economic Savings:
You avoid the high cost of a new part and its labor.
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Permanent Solution:
You permanently eliminate a common point of mechanical and electronic failure.
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End of Emergency Modes:
The vehicle will not re-enter protection mode because of this component.
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Fast and Reliable Process:
The solution is implemented quickly and securely through software.
Important note:
By disabling this feature, the only noticeable change will be a slightly more abrupt engine shutdown, similar to that of older diesel vehicles that did not have this system.
The rest of the vehicle's operation will be perfect.
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