Hot start problem

Does your car start perfectly in the morning, but if you stop it after a trip and try to restart it, it struggles or you have to hold the key for several seconds?

This is the classic and frustrating "hot start failure," a very common problem in certain vehicle models. The solution at an authorized workshop usually involves expensive replacement of the battery, starter motor, and sometimes even the alternator. At Digi-Tec / ReproRACE, we offer a definitive software-based solution that's much more economical and just as effective.

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What is the Real Cause of Hot Start Failure?

Contrary to what it seems, the problem is not usually a serious fault, but rather a factory parameter in the ECU software.
Boot Maps:

The ECU has "maps" that tell it how to start the engine under different conditions.

For hot starting, the manufacturer states that the starter motor must reach a relatively high minimum speed (e.g., 280 RPM) before the system authorizes fuel injection.
The Wear Factor:

Over the years and with use, it's normal for the battery to lose some of its capacity and for the starter motor to not turn as strongly as it did when it was new.
The Result:

When the engine is hot, this assembly (battery + starter motor) no longer has enough power to reach the 280 RPM required by the software.

The ECU, not registering the minimum speed, delays fuel injection, causing the engine to spin and spin without starting until, due to persistence, it finally reaches the threshold.

Instead of changing expensive components to force the software to meet its requirements, we tailor the software to fit the realities of your vehicle.

The process is simple and logical:

1. Reading the Software:

We read the original software from your car's control unit.

2. Parameter Setting:
We modified the hot start map, slightly reducing the RPM threshold required for injection (for example, from 280 RPM to 220 RPM).

3. Software Writing:
We load the corrected software into your ECU.

From that moment on, your car will start again on the first try, whether cold or hot, as the starter motor will effortlessly reach the new minimum speed required.

Benefits of the Software Solution

Drastic Economic Savings:

The software solution is much cheaper than replacing a new starter motor and battery.
Permanent Solution:

It's not a "patch", it's a permanent fix for this specific problem.
Speed and Without Mechanical Works:

The process is quick and does not require replacing any parts.
Totally Safe:

This modification does not affect the vehicle's performance, reliability, or fuel consumption in any way. It simply corrects a starting parameter.

Commonly Affected Vehicles

This problem is particularly common in many Volkswagen Group (VAG) engines, such as the popular 1.9 TDI and 2.0 TDI (assembled in VW, Audi, SEAT and Skoda), although it can also occur in other brands.

If you are experiencing this error, do not overspend.
Contact us and we'll offer you a permanent and affordable solution.

We create the files you need

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