This 55 plate Discovery 3 TDV6 HSE came in for a gearbox flush, whilst chatting to the owner he mentioned it felt a bit sluggish so we ran a diagnostics check and found one of the EGR valves to be faulty, quite a common problem on the Discovery 3 TDV6’s. One or both of the EGR valves stops working or gets carbonised so much that it is no longer able to operate or close properly. This can rob the engine of power and cause starting problems, particularly when cold. A new EGR valve is around £250 plus fitting so we suggested fitting an EGR blanking kit rather than replacing the complete valve as it is more cost effective and offers a permanent solution.
So we carried out the ATF flush and not surprisingly with 117,000 miles on the clock, the old fluid was very black and burnt smelling. During the ATF flush, the owner was able to watch what we were doing we had a chat about the EGR valves, explaining what they do and why there are fitted and the advantage of blanking them off. We also spoke about remaps and the advantages of having an increase in power and torque. We explained with a Monster Tuning Remap not only can we tune the engine but we can also delete the EGR valves via the software to prevent them operating or causing the engine management light to come on. So it was agreed mechanically blanking the EGR valves and a Monster Tuning Remap and EGR delete were the next jobs.
The Monster Tuning Remap was carried out using our Panasonic Toughbook with Alientech interface, this is a relatively easy and straightforward job unlike mechanically blanking the EGR’s which is quite fiddly and results in skinned knuckles! Best done with a few cups of tea to keep calm!
All in, a very satisfying job knowing that the gearbox will now give many more miles of trouble-free motoring, the EGR valves will never be the cause of any problems and the increase in power from 190 to 228bhp and torque from 440 to a massive 524NM, will make the Discovery nicer to drive and more economical.
If you fancy booking your car in for a remap, get in touch or give us a call on 01536 647577 to see what we can do.