Here's a breakdown of likely causes:
* Faulty Engine Control Module (ECM): The ECM is the "brain" of the engine. A malfunctioning ECM can cause a wide range of issues, including stalling and a flashing glow plug light. This is a significant and potentially expensive repair.
* Crankshaft Position Sensor (CKP Sensor): This sensor tells the ECM where the crankshaft is in its rotation. A faulty CKP sensor will prevent the engine from running smoothly or at all, and trigger a fault code displayed as a flashing glow plug light.
* Camshaft Position Sensor (CMP Sensor): Similar to the CKP sensor, a faulty CMP sensor will disrupt the engine timing, leading to stalling and a flashing light.
* Fuel System Problems: A problem with the fuel pump, fuel injectors, or fuel pressure regulator can cause the engine to cut out. While this might not *directly* trigger a glow plug light flash, the resulting engine stall would be consistent with your description. Consider low fuel pressure, clogged filters, or a failing pump.
* MAF Sensor (Mass Airflow Sensor): A dirty or faulty MAF sensor provides inaccurate information about the air intake, leading to poor fuel mixture and potential stalling.
* Low Battery Voltage/Alternator Problems: A weak battery or a failing alternator can cause intermittent power loss, resulting in engine stalling. While this might not directly trigger the light, the underlying electrical problem is crucial.
* Wiring Issues: Damaged, corroded, or loose wiring within the engine bay can interrupt crucial signals to and from the ECM.
What you should do:
1. Don't drive the van: Continuing to drive with a flashing glow plug light and intermittent stalling risks further damage.
2. Use an OBD-II scanner: This is the most important step. An OBD-II scanner (available cheaply online or at auto parts stores) will read the fault codes stored by the ECM. These codes will pinpoint the likely cause of the problem.
3. Consult a mechanic: Once you have the fault codes, a mechanic can diagnose and repair the specific problem. Trying to fix this yourself without the proper diagnostic tools and knowledge can be risky and potentially expensive.
Ignoring this issue could lead to more extensive and costly repairs. Getting it diagnosed promptly is vital.
