Software can be a cause of hot-start problems

The owner of this Volkswagen Caddy had visited several workshops and replaced various parts, but the vehicle still struggled to start when the engine was hot. A partner workshop sent the ECU file to AutoChip for software analysis.

Comparison with the factory software showed several significant changes: torque values had been reduced by 15%, while fuel quantity and turbocharger pressure had been reduced by 8%. The hot- and cold-start maps had also been altered.

AutoChip restored the factory calibration values. These changes could explain the starting issue, but the video does not show a post-repair start test. The software correction performed should therefore be distinguished from a verified test result, which is not reported in the recording.