Iac valve hissing sound.. this normal?
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Joined: Jul 2005
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Iac valve hissing sound.. this normal?
I noticed with my cai on and since I replaced the IACv that when i first start the truck up you hear a loud hissing from what appears to be the IACV. I took the cai off and it sounds like the hissing is coming from the IACV, after about 2 minutes this stops. Any idea if this is normal?
