Matt TDi
New Member
Hi guys.
Just fitted a 200TDi to a friend's Defender from a 2.5N/A. Engine conversion is all done and the engine seems to run sweet on the spot. Took it out for a drive and to start with it boosts very nicely, you can hear the turbo spooling up and it feels much nicer than the old N/A. Only problem is once the revs hit what I expect is around 2500rpm the car really noticeably backs off. This is any gear, and if you back off the throttle and go back on with the revs lower, it boosts as normal again up until higher revs.
The engine has been sitting for a while, so I discovered the wastegate actuator was seized shut, but I've now freed this up, but it's still the same. I've also checked the boost pipe to the fuel pump which doesn't seem to have any breaks in it, likewise the diaphragm in the pump is free too.
The turbo does have a little play in it, but not more than I've seen before on a used (but still working) turbo.
I can only conclude that the turbo is knackered and I'll replace it for a good used one, but my only concern is that it boosts very well upto a point, and every other car I've driven with a knackered turbo is pretty much dead on it's arse right from the off.
So is the turbo knackered, or are there any other ideas of things I can check before swapping it?
Just fitted a 200TDi to a friend's Defender from a 2.5N/A. Engine conversion is all done and the engine seems to run sweet on the spot. Took it out for a drive and to start with it boosts very nicely, you can hear the turbo spooling up and it feels much nicer than the old N/A. Only problem is once the revs hit what I expect is around 2500rpm the car really noticeably backs off. This is any gear, and if you back off the throttle and go back on with the revs lower, it boosts as normal again up until higher revs.
The engine has been sitting for a while, so I discovered the wastegate actuator was seized shut, but I've now freed this up, but it's still the same. I've also checked the boost pipe to the fuel pump which doesn't seem to have any breaks in it, likewise the diaphragm in the pump is free too.
The turbo does have a little play in it, but not more than I've seen before on a used (but still working) turbo.
I can only conclude that the turbo is knackered and I'll replace it for a good used one, but my only concern is that it boosts very well upto a point, and every other car I've driven with a knackered turbo is pretty much dead on it's arse right from the off.
So is the turbo knackered, or are there any other ideas of things I can check before swapping it?