thnet Posted February 5, 2012 Share Posted February 5, 2012 I am having troubles with my 300Tdi injection pump. There is a clear ticking from the front end of the pump and it has lost power. The sound is carefully located to here so it is not the vacuum pump or similar other periperichal equipment. The engine is not easy to start (we have -15 but still it do not respond as I know the 300 engine from previous LR´s). When it fires up it runs like on 3 cylinders. After a few seconds all four are in operation. I left the car idling for 10-15 minutes before driving. Then when driving I am having fine respons during low rpm or higher rpm without load on the engine and no smoke from the exhaust. As soon as I press the engine I loose power. It feels like the pump needs fuel, but now the motor develops black smoke. As soon as a loosen the throttle the power returns. I believe that is corolates to the tick sound of the pump. Do anyone have any idea of what is going on? Quote Link to comment Share on other sites More sharing options...
Scott R Posted February 5, 2012 Share Posted February 5, 2012 Have heard this problem before, it turned out to be a half blocked fuelline. Check all the fuel lines and make sure there are no restrictions in the lines or filter. Quote Link to comment Share on other sites More sharing options...
Frax Posted February 6, 2012 Share Posted February 6, 2012 I would change your lift pump, the injection pump sounds like it is struggling to pull and push fuel through. Quote Link to comment Share on other sites More sharing options...
thnet Posted February 6, 2012 Author Share Posted February 6, 2012 If that´s right it´s an cheap fix (I already suspended the house hold budget the next months to find money for a new injection pump ) I think that I will try to feed the injection pump directly from a dummy tank, allowing plenty of fuel for the pump, checking that this is the case. I tried to loosen every of the injector nozzles (is this the right english word?) one at a time to rule out a defective nozzle. Quote Link to comment Share on other sites More sharing options...
Tetsu0san Posted February 6, 2012 Share Posted February 6, 2012 it is going to be fuel starvation. Lift pump might be the problem but I suspect that there is a blockage as already said. Try blowing through each pipe and see if they are blocked. Even if you get a lift pump, if you don't clear the blockage (if you have one) then that may ruin the new pump too... Quote Link to comment Share on other sites More sharing options...
Troll Hunter Posted February 6, 2012 Share Posted February 6, 2012 Of course, with -15C, not unusual here, if a blockage is due to ice formation in your fuel lines just blowing them through won't shift much. You'll need to warm the system up or flush it with methyl alcohol, which itself has major fire and health problems. I'd opt for parking overnight in a heated garage. Mike Quote Link to comment Share on other sites More sharing options...
thnet Posted February 7, 2012 Author Share Posted February 7, 2012 I changed the fuel lift pump and the diesel filter and cleaned the pipes. It seems to do the trick. Thanks for your good ideas (which saved me the cost of an injection pump!) Quote Link to comment Share on other sites More sharing options...
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