Thread: rev problam

hello
on flat the disco go well.
uphill it start rev up and down with no power to accelerate.
if i'll stay with half pedal it will drive O.K, but if I'll "ask" for more, it will rev up and down and will not accelerate.
sorry for my english.

it's a whole theory about this but in a nutshell: due to that modulator you can get 230KPa manifold pressure instead of 210 like the Defender has, which means around 1.3 bar boost instead of 1.1 as the Defender so more power... the modulator managed by the ECM keeps the wastegate under controll with vacumatic command and the boost can rise more in the inlet manifold ... that's the gist of it ... you better fit a new one as it's not that expensive and not very hard to replace cos to work perfect without it you'll need different fuel map(for defender) loaded in the ECM , also by being bypassed/faulty/unplugged the modulator throws a fault code in the \ECM and the management/addaptive strategy will be disturbed...it works this way too but not at full(100%) capacity

Originally Posted by http://www.web-rover.co.uk/nav.php?p=td5kb/intro

In Defender specification, the Td5 develops 122 bhp (120 PS, 90 kW) at 4200 rpm, and in the Discovery this is upped to 136 bhp (134 PS, 101 kW) at 4200 rpm by use of a different fuelling map and an electronic wastegate. Along with 300 Nm (221 lb.ft) of torque at 1950 rpm, these relate to a 9% increase in power and 13% more torque than the outgoing 300 Tdi engine. From 2002 the Discovery automatic was uprated to produce 340 Nm (250 lb.ft) of torque at the same engine speed.