Intermitent power loss

[MrEd1970]

Hi all,
I have a 2006 Navara d40 , It's only just started every so often whilst at slow speed , taking off from lights and or normal driving she will lose power as if she is starving of fuel or flooding , she splutters few a few seconds then takes off leaving grey/black smoke behind her then everything is ok for a few days.
I have checked the primer bulb and it has been soft and takes about 3 pumps to harden up .
Any feedback would be great.
cheers
 

[NavBoss]

Hi MrEd1970,

Have you plugged a scan tool in to see if you have any error codes?

P0088 P0089 P0093 P1272 P1273 P1274 = Fuel pressure problems.

Any of these codes will generally be triggered due to low or high fuel pressure or abnormal fuel pressure pulses detected by the fuel pressure sensor. The ecm judges fuel amount passing through to the fuel rail by comparing SCV (Suction Control Valve) pulse to actual rail pressure as measured by the rail pressure sensor. With these calculations the ecm can determine if fuel delivery is out of range with the comparison of expected vs actual.

Possible Causes
Some causes of these codes to be triggered are: low/high fuel pressure, SCV, fuel pump, air ingress into fuel system, fuel pressure sensor, fuel pressure relief valve, wiring. If you have an aftermarket performance chip installed on the vehicle, please remove it and see if the code will clear.Common causes are the SCV and the fuel pressure relief valve. These can cause low fuel pressure and stalling.The fuel pressure relief valve, will open if fuel pressure becomes too high. This can happen if the scv is failing and also if an aftermarket performance chip is installed on the car. It will be a high pressure condition followed by a low pressure condition when the relief valve opens.