1. There could be some issue with the electricals / ground points. Issue could be with fuse box / fuses. Press it all once again to eliminate loose connection.
2. Check the battery voltage. If the voltage is too low, try recharging it or replace it based on its condition.
3. How long is your vehicle? If it is too old, better check and clean EGR valves, Fuel puml, Air filter, Air intake manifold etc.
Since you did not mention about any warning lamps and also the issue is not happening everytime, we can rule out the glow plugs, starter motor problems.
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Monday, January 6th, 2014 AT 12:25 AM