Thread: TD5 running rough, no power.

Looking at the engine from the front with the bonnet open, you will see a plug going into the head (your left, vehicle right). It controls the injectors. Under the rocker cover there is a loom that is known to get contaminated as it is always surrounded by oil. This loom has a connector at each injector. Oil tracks down the loom and causes the injector pulses to flutter causing low power, rough running, etc.. It will also force oil into the main loom, which will eventually find its way down the wires to the ECU (found under the drivers seat). Worth un plugging the two large plugs and checking for oil contamination here too... Good luck.

What about the fuel pump? My D2 Td5 ran so rough and lacked power when it failed.

As noted already...

*Injector harness needs replacing and also clean out the plug that goes into it. (random fault codes that dont always make sense)
*Oil has got into the red plug on the ECM or worse inside, needs cleaning (codes as above)
*If missing and rough all the time, its relatively common for a injector to fail (or rather the solenoid on the injector) (fault code for injector number (insert number here) open circuit)
*Fuel pressure regulator is leaking (no codes)
*Very rare, (common on TD5 Discovery 2, rare on TD5 Defender) but the in tank fuel pump can fail, with ignition on, listen for pump, as a general rule if loud and proud, its ok, excessive noise its purging air out of fuel system. (no codes)

Regards
Daz

Thanks....

ECU injector Loom- I replaced this some 6 -10 months ago, before Turbo was done.

Will have a listen up and see how Fuel pump is going (or sounding).....

Then will be putting new fuel filter on as have ordered one anyway.....even though when I drained the old one it looked okayish..... Is overdue for changing anyway!

And having a look at the Wastegate valve and MAP sensor.....

not quite sure how to check on MAF sensor, to see if faulty or not......

Cheers, Col.