G'Day. Need some help. Have Discovery 2 v8. Had injectors recently cleaned and since was done difficulty in starting. Once starts runs like a dream. So far had replaced - fuel pump, spark plugs, leads, battery, both coil packs. If car sits for 5 - 10 min starts well. Once it has sat there for over a couple of hours feels like no fuel when turnover, then fires up rough for a couple of seconds and all is good.. Any ideas ! Thanks Nick

 

Back to basics...

check for spark (use a spare plug and lay on manifold)

should hear fuel pump run for about 2 seconds at position 2 of the key. You may need to turn key "on" several times in a row to build up fuel pressure. This would indicate a leak down of course, which could be related to pump, injectors, etc. Their is a fuel pressure test valve, but it is rough to get to at the rear corner under top of intake (passenger side down under).

 

Thanks Savannah Buzz. Had loss of fuel with pressure test 3 days ago. First pump was second hand and replaced with new one. Also new platinum plugs and leads at same time. Fuel pump works fine. Any quick way to check for injector leaks.

 

They are usually more visible. There is also a filter strainer built into each injector. But they are also electric. Fuse 1 in underhood box is + battery to all injectors, then each injector is grounded by ECU to make it squirt fuel. Bad fuse or harness disturbed? Each injector coil should read 13.8 - 15.2 ohms.