Join Date: Sep 2012
Location: USA, OR
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Thats the thumper valve we all hate. Its up on cowl, hidden and makes noise. Wouldn't suprise me if someone unplugged its thumper @ss to make it stop. It can sound like a major mechanical problem when all it is is a valve cycling off and on. It Pathetic!
Its all top side under the hood to the left of the AC lines. Set your face on the engine and look under the lip and you see some hoses and wires. Its a joy to get to.
I would pull it and blow through it both ways. Then apply 12v and repeat. Although you're hear and feel it clunk when power is applied.
It comes on above idle speed, engine hot, car moving.
2006 Mazda 6s GS Hatchback, Lapis Blue | AJ 3.0 & AW6A-EL 6 Spd, >119,000
V6 repair info here:
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