Hi All, I am new to this forum. Hoping someone can help me with my problem. I have a 1999 GU TD42 non intercooled Factory turbo,17000Km on clock. Engine wont idle, cuts out under 1500 RPM, A lot of white/grey smoke at no load up to 1800RPM,poweer,smoke and fuel consumption ok at 2000RPM+,no power below this, getting worse over 3 months, Hard to start with out ether hot or cold. So far have tried the following-- 1 New oil and filter, new Air and Fuel filters.2 No air in fuel, have bypassed filter with gravity feed to IP with clear tubing. 3Fitted electric pusher pump near tank 12 months ago. 4 Removed fuel inlet thimble/banjo screen to IP. 5 All cylinders drop same revs when injector lines cracked. 6 Injectors removed and checked, advised by diesel shop that is not the problem. 7 Replaced solenoid valve on IP, can hear it clicking. 8 glow plugs and circuit checked ok. 9 Never overheated, no blow by, oil stays clean and does not use oil. 10 intake system not oily. 11 Sucked on airline to IP so think diaphragm is ok, holds vacuum. 13 Advanced IP timing by turning flange clockwise, IE top away from block. Does not use water/coolant. Have scratched head a lot and read al the threads I can find, still no joy. . Thank you in advance.