what rev does the turbo kick in TD4

hi all, my 2003 td4 is very pporly, when stone cold it drives ok but a little rough.

once warm it wont rev past 2000 when under load, my thought was that perhaps the turbo isnt kicking in,

what makes the turbo kick in.

there is no smoke or other undue symptons

Check vac piping from brake servo line to turbo boost sensor at back of engine drivers side

Check main turbo pipe to turbo, they have a habit of splitting

Check maf sensor - see link below, another common issue
ROVERRON TUNING. HOME

two hoses at front of engine, one a small right angled hose, the other longer at the other end, check them both for splits etc. if either has oily deposit on outside, change it as it's oil leaking out of the hose under pressure

Hmm . . . .dissconect the maf sensor and see if it improves ,easy job most earthlings could do it ,if it improves then yer maf is fooked [get a new un] or as suggestid ,er rover ron mafam . . . . .

wigleytuff said:

two hoses at front of engine, one a small right angled hose, the other longer at the other end, check them both for splits etc. if either has oily deposit on outside, change it as it's oil leaking out of the hose under pressure

Click to expand...

hi, the hose split on my prev freelander, the power loss was similar but there was also loads of smoke.

i have checked both pipes and they look ok but i will take them off and double check.

i took it for a spin last night and it seems ok when cold, with a slight flat spot.

as it got hot it becomes totally flat after just under 2000 revs and wont rev higher than that when under load.

i also could hear the turbo, which i can do normally.

what makes the turbo kick in

regards

Air entering the engine first passes through an exhaust driven compressor. Compressed air results in a larger quantity of air being forced into the engine, creating more power.
The energy used to drive the turbo compressor is extracted from waste exhaust gasses. As exhaust gasses leave the engine they are directed through a wheel placed in the exhaust flow. The gasses drive the turbine wheel around, which is directly connected via a shaft, to the compressor wheel.
Increased exhaust gas drives the turbine wheel faster, this provides the engine more air, producing more power. A limit is met once a pre-determined boost pressure is achieved. At this point the exhaust gas is redirected away from the turbine wheel, thus slowing it down and limiting the maximum boost pressure. This redirection valve is known as the wastegate.
This extraction of energy, from exhaust gas, to improve engine efficiency is the device known as the turbocharger.

hope this explains

TD4 said:

Air entering the engine first passes through an exhaust driven compressor. Compressed air results in a larger quantity of air being forced into the engine, creating more power .
The energy used to drive the turbo compressor is extracted from waste exhaust gasses. As exhaust gasses leave the engine they are directed through a wheel placed in the exhaust flow. The gasses drive the turbine wheel around, which is directly connected via a shaft, to the compressor wheel.
Increased exhaust gas drives the turbine wheel faster, this provides the engine more air, producing more power. A limit is met once a pre-determined boost pressure is achieved. At this point the exhaust gas is redirected away from the turbine wheel, thus slowing it down and limiting the maximum boost pressure. This redirection valve is known as the wastegate.
This extraction of energy, from exhaust gas, to improve engine efficiency is the device known as the turbocharger.

hope this explains

Click to expand...

hi thanks for that, the figure i was looking for was about 2000 rpm.
all sorted now cheers