Re: 2000 echo check engine light
The throttle body is at the end of the intake hose. (see attchment)
The noise your hearing is probably like you said, the air cleaner box is not properly seated. There are 2 tabs at the back of it that fit into spaces and then 2 clips secire it. Make sure you get the Vac lines put back on it their propr spots.
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2002 TUNDRA AC 2WD = NOT STOCK
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