Quote:
Originally Posted by toddman67
That is an air injection manifold check valve. It allows the air to be introduced into the exhaust manifold through the invertor valve and air pump. Its pupose is to stop exhaust gases to return back into the air system.
Look up the part on the website of your parts store with the year, make, engine under emissions.
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If i took this check valve off and drove with it off (but not permanently off) would that be ok? Then itll be easier to see if thats actually where the sound if coming from but i don't wanna mess anything up by not having it connected.