a nice easy check is to crack the injectors and see how long it takes to get a positive squirt out towards the battery, not just a dribble, another thing to do it change out the fuel pipe between filter and pump for see through pipe, then look for any kind of regular bubbles once running, will let you know if there are any holes in the fuel lines, sounds like itll be the vein pump seal meaning new or second hand pump but check for bubbles first
Hello All, My problem is slow starting when cold or perhaps when left sitting (maybe 10 seconds cranking) I appreciate this has been covered and there are some obvious solutions, usually Glow Plugs/ fuel Filter or injectors. I changed the Glow Plugs (2 were bad but no improvement) there is 12 volts on the glow plug rail when the pre heat lamp is on and I can hear the relay clicking on, the time it stays heating is reasionable and the same as it has always been so I am sure the issue is not here. I had the injectors checked one was not great (low on pressure) but good enough to work I was told and this has now been refurbed. I also changed the fuel filter and primed it. I am thinking it may be more to do with the fact the car is sitting and fuel is some how draining from the pump rather than the cold temp of a morning start but I am not fully convinced. I have given a good search of the forum and I see some ideas on fuel flowing back in to the fuel tank and talk about fitting a no return valve to prevent this. I assume the no return valve would go between the fuel tank and the input to the fuel filter is that correct? Every thing runs so well once it starts that I really dont think I have bad compression or any thing fundamentially wrong. I could slacken off one of the injector pipes and see if diesel is present right away when I do a morning start as I did notice when I was removing the injectors that no diesel spilled from the injector pipes when I opened them. Any thoughts please? Car has about 160K miles and runs perfect once it starts. Also is there a second fuel pump in the tank to bring fuel up through the filter to the injection pump? Could that be the issue. I have not been able to find a diagram of how the fuel and injection system works but I assume it is tank/ filter/injection pump/ injectors.
now you mention it i had all the belts re-placed late last year and the mechanic said the balance belt had snapped and couldnt get the pulley off,so he changed all belts and left balance belt off! he said it wouldnt cause any issues,was he telling porky pies to me!? what are your thoughts about it?