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A worn out, stiff or cracked PCV or vent hose can cause vacuum leaks leading to high idle, check engine light and loss of macho-ness.
Stuff ages pretty quick under the hood due to extreme heat cycles and age. Stay on top it and replace them before there are problems.
PCV hose connects to the PCV valve and to the intake
VENT hose goes from valve cover to intake piping
Genuine Toyota parts