This issue can be due to several things, such as starvation from the low pressure system, blocked fuel filter or lack of pressure from the high pressure pump.
Most commonly the fuel pressure regulator is the cause of the problem,but here's a snippet from the FAQ section on my new site:
"There are several fault conditions at which the ECU is programmed to shut down the engine. The most common cause of this is due to the fuel pressure demand not being met: If the fuel pressure measured is more than 250 Bar below the requested set point, the ECU will shut down and store a fault code (P0230).
This can happen when the fuel pump is worn out (usually on high mileage cars) or the injectors are leaking fuel through. Other conditions at which the engine will be shut down for 10 seconds are when the fuel pressure regulator duty cycle reaches 97% or if the fuel pressure drops at a rate of higher than 1000 bar per second. This causes a shut down as the ECU will think there is a fuel leak.
99% of the time this problem can be fixed for free by removing the fuel pressure regulator from the right side of the fuel pump and giving it a clean. (Be careful to avoid damaging the O-rings with your cleaning fluid. Also the two Torx screws holding in the fuel pressure regulator are made of a very soft metal. Be sure to get your tool square on before attempting to loosen.)
Another common problem on the HDI is the low pressure lift pump. This can become blocked up or worn and and fail to supply enough fuel to the high pressure pump. If you're having problems get in touch and I will advise on the best course of action."
I have found that on heavy stage two tunes there are other things that can be altered in the software, I've not had any cutting out for about a year now since figuring this out, except if the pump is excessively worn...
Most commonly the fuel pressure regulator is the cause of the problem,but here's a snippet from the FAQ section on my new site:
"There are several fault conditions at which the ECU is programmed to shut down the engine. The most common cause of this is due to the fuel pressure demand not being met: If the fuel pressure measured is more than 250 Bar below the requested set point, the ECU will shut down and store a fault code (P0230).
This can happen when the fuel pump is worn out (usually on high mileage cars) or the injectors are leaking fuel through. Other conditions at which the engine will be shut down for 10 seconds are when the fuel pressure regulator duty cycle reaches 97% or if the fuel pressure drops at a rate of higher than 1000 bar per second. This causes a shut down as the ECU will think there is a fuel leak.
99% of the time this problem can be fixed for free by removing the fuel pressure regulator from the right side of the fuel pump and giving it a clean. (Be careful to avoid damaging the O-rings with your cleaning fluid. Also the two Torx screws holding in the fuel pressure regulator are made of a very soft metal. Be sure to get your tool square on before attempting to loosen.)
Another common problem on the HDI is the low pressure lift pump. This can become blocked up or worn and and fail to supply enough fuel to the high pressure pump. If you're having problems get in touch and I will advise on the best course of action."
I have found that on heavy stage two tunes there are other things that can be altered in the software, I've not had any cutting out for about a year now since figuring this out, except if the pump is excessively worn...