SVP Diesel Mechanic Practice Questions - Saudi Skill Verification Program - Diesel Heavy Vehicle Mechanic Exam

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When diagnosing a common rail diesel system, a mechanic measures an idle fuel rail pressure of 1800 bar. What immediate action should be taken?

Bleed the fuel system to relieve pressure. Shut down the engine immediately due to dangerously high pressure. Check the fuel pressure regulator for proper function. Continue diagnostics by checking other system parameters.

Correct Answer:

Shut down the engine immediately due to dangerously high pressure.

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