Hot & Cold Start Fix
START · EVERY · TIME
Some vehicles have a software quirk that makes them hard to start when the engine is hot, or reluctant to fire from cold. Rather than throwing parts at it, I can often fix it with a software calibration — fully mobile, and it won’t affect your MOT.
What it is
A number of cars suffer from a known ECU software bug that causes hard starting — either when the engine’s already warm (hot-start) or first thing on a cold morning (cold-start). Garages often reach for a new starter motor, but where the cause is in the software, that’s an expensive fix for the wrong problem.
The benefits
Fixes the actual cause
Where the hard starting comes from the ECU calibration, adjusting the software resolves it properly rather than masking it with new hardware.
Saves an unnecessary repair
It can save you the cost of replacing a perfectly good starter motor that was never the real issue.
Reliable starting, every time
The car fires up cleanly whether it’s stone cold or heat-soaked.
An honest word
This only applies where the hard starting is genuinely software-related. If your starting problem is mechanical — a failing starter, battery or wiring — I’ll tell you straight, because a software change won’t fix a hardware fault. A quick diagnosis first tells us which it is.
How I work
The fix is carried out fully mobile across Bridgend, Cardiff, Swansea and the M4 corridor. Your original ECU file is always read and saved first, so the car can be returned to standard at any time.
Because this is a software calibration and doesn’t touch physical emissions parts, it won’t affect your MOT.