// discovery 2 td5 · owner guides_
td5 guides
Practical write-ups for Discovery 2 TD5 owners. Written because we had to learn this to build the tune, and because a map is the wrong answer to most "it feels flat" complaints.
TD5 has no power under load: check this before buying a map
Sudden power cut under load usually isn't a tuning problem. The boost-control path, the MAP and MAF sensors, and fuel supply — in the order worth checking them.
Before remapping your TD5: the health checks that actually matter
Real MAP and fuel-pressure figures, what they mean, and the six checks that tell you whether your TD5 is a good candidate for a map.
Upgrade your TD5 yourself — in minutes
Why a TD5 remap normally means a queue and a posted ECU, and how the self-service flow works instead.
We sell a self-service remap for supported automatic Discovery 2 TD5s — but the compatibility check is free, and these guides are worth reading first either way.