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Question about a vacuum pump

1K views 2 replies 3 participants last post by  Smokin' Corn 
#1 ·
Not sure if its a problem or not but just noticed a noise when i turn the key on (just the glow plugs) what i believe to be is a vacuum pump behind the passanger side battery. It seems to be running non stop with the engine running or off. I only started hearing this run about 2 days ago. Any thoughts?
 
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