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Discussion Starter · #1 ·
On my wife's 04 intrepid there's a hose connnected to (i think its called the plenum) and the connector gets sucked in when the car is running. What is this hoses purpose?
 

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It is the vacuum source for the evaporative emissions system that pulls fuel vapors out of the canister through the purge valve - see diagrams below.

From the FSM - showing evap system. Red arrow points to the line (15) that connects to that elbow just forward of the throttle body (not shown):
41691


From parts pdf file - showing complete vacuum system. Red line identifies the vacuum line going from throttle body to the purge solenoid:
41692
 
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Discussion Starter · #3 ·
Ok, so if its getting sucked in at the elbow what all could that do? Would the car lose power or lower fuel economy? Or what else?
 

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Your engine idle will be high because there will be extra air entering downstream of the TB butterfly, and you'd likely get an evap. system fault code.
 

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Sorry - the symptoms I mentioned would be for if the elbow were to split open and leak air. If it's only collapsing and not leaking, you wouldn't get a code unless it collapsed enough to greatly restrict or totally shut off its air flow.

No name that I know of. Everybody just calls "that vacuum elbow on top of the plenum in front of the throttle body". :)
 

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Here's a recent thread on the same part, except on the 3.2/3.5: Intake Manifold Vacuum Hose Connection

My guess is that it's the exact same part as on the 2.7. Post nos. 2 and 3 give a part number for a Dorman part that supposedly fits, and a suggestion to consider finding a factory one in a salvage yard with some 2nd gen LH cars.
 
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