M9000 injection pump shut off solenoids vibrates.

BJW

New member
May 6, 2026
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M9000 with cab, mechanical shuttle.
When preheating before starting, the injection pump solenoid vibrates generating a lot of noise.
Turn key to start, and starter engages and engine starts ok and stays running.
What can be causing the shut off solenoid to vibrate when preheating?