Thread: td5 dies with more than 1/3 throttle

Ah, so the problem is occuring under load. Excessive boost fault then, so likely to be the modulator as already mentioned but could be the wastegate actuator has failed or the wastegate is stuck open. I suspect the loss of engine power occurs around 2500 rpm which is when the turbo produces too much boost if not limited which triggers the ecm to cut fuel until boost is no longer excessive, hence the surging.

i have seen the fuel pump fail and the engine will still run but with limited power. the only reason it will run is because the injectors have enough scavange to suck fuel you may find that once you change the fuel filter the fuel pump will not prime as you have allowed air in the system and now the pump will not work. when you free rev the engine ie netural or park will it rev over 3000rpm?

Originally Posted by dundee3012

i have seen the fuel pump fail and the engine will still run but with limited power.

I should have remembered that one. I had just fitted a pressure gauge to a friend's TD5 to check the fuel pressure because it was having much the same problem but found the engine wouldn't start anymore. I thought the pump must have finally died right then but perhaps the injectors lost their prime when the gauge was fitted in place of the fuel temp sensor. Anyway, a new pump was indeed required.

Hi all
After some further investigation have found that the small rubber line that runs from the inter cooler inlet to the waste gate controller is missing. So am assuming that currently the waste gate is not working correctly which would give high pressures. Will replace this and see how it goes. Don't think that it fuel pump gone as it can get upto speed just can't get over 2500 rpm.
Thanks
Josh

Hi
Turned out to be missing air line from inter cooler to waste gate controller $12 later no more surging
THanks
Josh

Woohoo! Picked it....

Unfortunately these experiences come from being there yourself.

Oh, I too discovered my fuel pump had died after changing my filter chasing a low power issue.

So, now all you need to watch out for is coolant leaks, head gaskets and prop shafts and you will catch up to the rest of us.

Sorry, forgot oil pump bolts.