Puma dying on hills

Gauldie · Sep 3, 2019

Hi folks I have an 07 plate puma 110 defender, it is losing power on hills once it has done around 20 miles and gotten the heat up, fine when cold. It's almost like a limp mode but engine management light doesn't come on and no faults are recorded on the computer. Have changed fuel filter and no signs of holes in turbo pipes. I wish it would just come up with a fault on computer as I am lost at where to start. Any help would be very much appreciated

mick the builder · Sep 3, 2019

Guessing here but is turbo hose collapsing when hot.?

Wimblowdriver · Sep 3, 2019

Things you can look at (and possibly cross off your list);
Check the variable vane mechanism on the turbo is working. They can stick. Does the actuator arm jiggle up and down when you switch the engine off after a run? (it should do this to keep itself clean).
Check the intercooler is not split, this tends to happen at the front face at the inlet end. You will need to take the front grill off (a few screws to remove, and possibly the cowl between the engine and radiators to see the back of the intercooler properly). The alloy core tends to let go of the plastic inlet and outlet boxes.
I would expect both of these issues to generate fault codes but at least you can do some checks.

Gauldie · Sep 3, 2019

mick the builder said:
Guessing here but is turbo hose collapsing when hot.?

Doesn't seem to be. Tonight I noticed a tiny oil mark on small turbo pipe, wiped clean but couldn't see a pin hole but taped it up regardless and will see if any improvement tomorrow

Gauldie · Sep 3, 2019

Wimblowdriver said:
Things you can look at (and possibly cross off your list);
Check the variable vane mechanism on the turbo is working. They can stick. Does the actuator arm jiggle up and down when you switch the engine off after a run? (it should do this to keep itself clean).
Check the intercooler is not split, this tends to happen at the front face at the inlet end. You will need to take the front grill off (a few screws to remove, and possibly the cowl between the engine and radiators to see the back of the intercooler properly). The alloy core tends to let go of the plastic inlet and outlet boxes.
I would expect both of these issues to generate fault codes but at least you can do some checks.

Gauldie · Sep 3, 2019

Thanks very much, been a late finish tonight but will investigate tomorrow. I was thinking it all seemed a bit technical and over my head but the diagrams you attached should help a lot, thanks again

Puma dying on hills

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