1.9 td wont start low fuel pressure PLEASE HELP ME

[ovlov v4]

Hi please post ant reply that could help me
I have a 2003 v40 1.9 diesel
Ive renewed the egr cleaned all the air intake and vaccum hoses
Air and fuel filters
I also replaced the common fuel rail whitch helped make the car start for a day or 2

The car wont start unless you use easy start.
Once started it drives great plenty power there
It doesnt matter if the engine is hot or cold

I cant afford any more garage bills for it so any help is greatly appreciated

[ovlov v4]

could it be the fuel pressure regulator?
if it is what does it look like? and where will i find it?
thank you

[tommy309]

Hi buddy, im not an expert on these by any stretch but i am a mechanic so heres some general ideas, the pressure regulator on a common rail diesel is usually on the high pressure fuel pump, i suppose it could be faulty but on other cars ive worked at if the regulator is showing a fault its normally because the pump isnt producing enough pressure and requires replacing. if you have a diagnostic tool that allows you to check fuel pressure readings that would be a good place to start.

[5cilinder]

The pressureregulator is on the fuelrail the device on the pump is a fuel quantity regulator

[KBB]

Pressure is controled by a combination of the pump Inlet Metering Valve (IMV) and the Fuel Rail Pressure Control Valve (FRPCV). Monotoring the rail pressure is the Fuel rail pressure sensor (FRPS).

The are a large number of possible faults here that can lead to a difficult to non starting CRDI engine ranging from the low pressure pump side to loss of pressure through bad injectors (excess leack back) and not to mention bad sensors/actuators and wiring faults.

To realy get any where you need to start with a good scan tool that has good live data ability and under rail pressure PIDs look at actual rail pressure against desired pressure, that would be the starting point.

One point worth mentioning is that CRDI engines are very dependant on cranking RPM which must be around 220-250 rpm inorder to generate the pressure and the all important crank positioning sensor correct amplitude of signal. A lot of these are down to a tiering battery and excess voltge drop on the starter circuit.