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Old 10-29-2006, 09:27 AM   #1
Scooby Newbie
Member#: 105923
Join Date: Jan 2006
Location: Cheyenne, WY
04 WRX

Default Occassional knock at idle?

I was doing some live tuning and noticed that at idle I was getting an occasional knock (720-730rpm). I didn't log it but was curious if anyone else has seen any knocking at idle. I don't get any knocking under load, only an occasional one at idle? Not sure if it is a true knock or if the sensor is picking up noise from belt tensioner or valve noise. Just wanted to know if this is common or not. 2004 WRX 28kmi Mods are 16g, Spearco TMIC, pnp exhaust manifold, helix uppipe, turbo xs stealth back exhaust, perrin pulley, walboro pump, and one step colder plugs.
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