So my father has an issue with his 9500 50th anniversary combine, the engine won't start until the weather reaches around 20° C and it just stops on the afternoon once the weather is "cold" once more, battery, fuel pump (bosch) and filters are ok.
During the day, the engine works with no issues.
We live in Mexico and the combine is around 3-4 hours away from the nearest dealership, they have charged a lot of money going there to check and try to fix it with no success.
Any idea on what is the issue? I've read about pump timing and thermistor failure but want to hear from you.