Diesel hard to start hot.

[portal pat]

It's an old thread but I have recently purchased an 06 4.2 flat tray and I'm having the same trouble. Mainly it takes longer to start when it hot. The plunger is tight to pump and even when pumped a few times it makes no difference. I just serviced it and replace the fuel filter with a new ryco so it's good quality there. After it finally starts it blows a little bit of smoke but not heaps. Someone help cause I'm buggered if I know

My Patrol has gone now but I sussed what the problem was with mine eventually and it was expensive. When the IP gets hot tolerances internally get loose to the point where it won't pump hot diesel from a starting position. This is because the viscosity of the diesel drops as the temperature of the fuel rises. It can cope once running but won't pick it up from a stop. When the motor is cool, viscosity increases and all seems good......till next time!!! The only cure is an IP pump rebuild, and throw in some new injectors whilst at it. Bloke in Devonport did mine,can't remember the name. Another point-make sure pump is correctly times when re-installed. Most are not and it makes a huge difference. Think factory is .62 and safe improvement is .70. Can't stress this point too much. Good luck mate.