humming noise, tach stays at 2k???

mk3-4-me

New Member
May 19, 2010
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Milwaukee, WI
So i had some valves stuck open on my old head, just put a new one on. The car hasnt been started yet after the rebuild.

so im cranking the car over, and the tach is moving a lil up and down, not alot but it is. So after a couple tries, the car doesnt crank anymore and theres a humming noise thats coming from right by the firewall somewhere on passenger side. Now the tach just goes straight up to about 2k and stays there, with the humming noise going on.

The noise is there when i have the key in the acc. mode. Its not only when im turnig the key to crank it.

So im really pissed off at this car now!! its been way to long. Any advice would be cool.
 

mkiiichip

New Member
Sep 10, 2007
1,434
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42
WI
Relays can buzz when there is not enough voltage to keep them engaged.
Whats the battery voltage?