If a Diesel engine starts easily and quickly when cold but start hard when hot this is Hot Start Problem.
Usually the hot start problem is not typical for new vehicles and it appears after some time of usage, it is related to hard start when engine is hot. No matter if you have used your vehicle for 20 min or 20 hours, once it is switched off it will not start again immediately while it is still warm.
If a Diesel engine starts easily and quickly when cold but start hard when hot this is Hot Start Problem.
These diesel engines are started by an ECU and not by the driver. Pressing the accelerator pedal has no effect during a starting procedure. Starting is actually controlled by a ‘starting map’ in the ECU and is based on starter-engine speed, injected fuel quantity and programed torque. The ECU will not allow start fuel injection until the engine rpm is above a fixed map value.
The problem is present in all vehicles: cars, trucks, agricultural, etc.
We can fix it
The solution to the problem is to modify the engine control module software, after the repair the car will start normally again.
The service covers all types of vehicles and all types of engines such as TDI, D4D, DCI, TDCI, CRDI, etc.