Solving cold start problems in TDI engines with pump-injector technology

Causes of cold start problems with TDI engines

Many drivers of vehicles with TDI engines and pump-injector technology are familiar with the problem: the vehicle starts very reluctantly or with several attempts in the morning after a long period of inactivity. However, this starting problem often disappears by itself as soon as the engine is running. But why does this phenomenon occur in the first place and what is the technical background? We have clearly illustrated the questions and answers in this explanatory video and supplement our blog post "07eins Performance Fuel Supply Kit eliminates starting problems and protects the engine":

We have clearly illustrated this process in our explanatory video. Basically, diesel fuel is continuously transported from the tank to the cylinder head and back again by the fuel pump to ensure that sufficient fuel is available for the injectors at all times. However, after a longer downtime, especially overnight, a crucial problem arises: the fuel lines in the cylinder head are partially filled with air and are not immediately flooded with diesel again.

This is due to the small line cross-sections and the fact that trapped air cannot escape immediately. The system is only vented again by continuously actuating the injectors when attempting to start. This "venting" is noticeable through longer starting attempts ("organing"). In the meantime, unburned fuel can enter individual cylinders and migrate past the piston into the engine oil, which leads to oil dilution ("oil build-up").

The solution - the 07eins Performance Fuel Supply Kit

To solve these cold start problems effectively and permanently, the 07eins Performance Fuel Supply Kit was developed. This innovative product acts directly on the cause:

The Performance Fuel Supply Kit has a special 2-channel threshold pressure valve which is connected to the vehicle's original fuel couplings. This valve automatically disconnects the cylinder head from the rest of the fuel system as soon as the engine is switched off. The pressure limits of the valve are so precisely adjusted that neither the engine running nor the fuel pump are restricted in their function.

As a result, the cylinder head always remains filled with fuel, even if the engine is not running for a longer period of time. This means that the injectors can be supplied with diesel immediately and without delay at the next start. This not only ensures reliable and fast starting behavior, but also prevents harmful effects such as oil dilution due to unburned fuel.

Conclusion

With the 07eins Performance Fuel Supply Kit, annoying cold start problems and unnecessary strain on the TDI engine are finally a thing of the past. Invest in a sustainable and reliable solution for your TDI engine and enjoy trouble-free engine starting and an improved service life of your engine at all times.

Further information

For further technical details and ordering options, please visit our product page for the Performance Fuel Supply Kit.