Trickdick

Member

• Mar 1, 2018

• #1

Neither me or my mechanic are any the wiser over this problem. Under normal road running i.e. steady moving away from stop to 50mph plus, the disco runs as normal. When under load such as going up a hill or accelerating, the old boy starts to "hunt" for power and waivers between 2.5 - 3k revs, only stopping to do so when easing off the pedal. This obviously doesn't give him much power and he starts to slow down as the revs are not pushing him enough. Any one had the same problem? Also seems to not get out of third gear quick enough and that adds to the problem of acceleration. Thanks in advance

 

1988smithy

Well-Known Member

• Mar 1, 2018

• #2

Is it an auto by any chance?

 

Trickdick

Member

• Mar 1, 2018

• #3

yes

 

1988smithy

Well-Known Member

• Mar 1, 2018

• #4

Now I know feck all about autos, not much about manual gearboxes tbf but first thing I thought was torque converter purely from some dregs of memory reading thru endless threads on here. Hopefully someone will be along soon who's got the knowhow but in the meantime I'd be searching for disco 2 torque converter symptoms or autobox hunting for gear etc

Edit @jamesmartin might be a good shout

 

Last edited: Mar 1, 2018

sierrafery

Well-Known Member

• Mar 2, 2018

• #5

Seems like overboost or turbo ovrspeed protection, unplug the AAP sensor(on the airbox) and test drive it so...if it's better we'll speak then or just google out "Td5 overboost"

 

Hellastony

Active Member

• Mar 2, 2018

• #6

Get it plugged in to either a Nanocom and read the codes, rather then guess, unless Fery's suggestion works, as it might well do, but you need to record live data to see what the problem is, and you can only record this on a Nanocom.

Tony

 

Trickdick

Member

• Mar 2, 2018

• #7

sierrafery said:

Seems like overboost or turbo ovrspeed protection, unplug the AAP sensor(on the airbox) and test drive it so...if it's better we'll speak then or just google out "Td5 overboost"

Click to expand...

Thanks for the information - Ive found a report after googling and have passed to my mechanic - http://www.discovery2.co.uk/wastegate.html
Ill let you know how we get on. cheers

 

Trickdick

Member

• Mar 2, 2018

• #8

1988smithy said:

Now I know feck all about autos, not much about manual gearboxes tbf but first thing I thought was torque converter purely from some dregs of memory reading thru endless threads on here. Hopefully someone will be along soon who's got the knowhow but in the meantime I'd be searching for disco 2 torque converter symptoms or autobox hunting for gear etc

Edit @jamesmartin might be a good shout

Click to expand...

cheers we'll try this out

 

Trickdick

Member

• Mar 20, 2018

• #9

Thanks to all who helped - it was the Turbo Charger Waste Gate Modulator (Overboosting) 20 minute job seems to have fixed it. Link in below post