Yep, there's a vacuum leak. I would guess (take it for what it's worth) that the intake plenum has a leak somewhere around the surface where it mates to the lower intake. The reason why it runs faster after it warms up is because something is expanding due to the engine's heat and opening up a gap. Get yourself a fresh bottle of propane and a regular blowtorch. While the engine is running (after it has warmed up and is idling fast) pass the *UNLIT* blowtorch (valve wide open) closely over all areas in the engine compartment related to fuel delivery. If you're lucky, the propane will get sucked into the engine when you pass the torch over the area of the leak, and there will be an audible change in engine RPM. (It may go higher or lower briefly, then settle, but it should be repeatable.) With luck, it's just a bad plenum gasket and not a crack in the plastic plenum itself. Another possibility would be the throttle body mounting gasket.
On Wed, Jan 7, 2009 at 8:04 AM, John Bradshaw K4SWX < [email protected]> wrote: > Owners and owners-to-be of the Intrepid.Speaking of the Idle air control > valve My issue with the high idle is still present after replacing it altho > its a little more manageable now. so far a rotted hose has been replaced > and the IAC, RPM at idle will still get up to around 2K but usually after > the car has been running for a short time.. on initial startup the rpm is in > normal ranges. Now would i be correct to assume theres a vacum leak > elsewhere in the system? Its been replaced now for over a month and i figure > by now the computer would have re-adjusted for the new part.. > > > John Bradshaw K4SWX > Fayette County ARES > District 13 ARES > CERT Team 9 ------------------------------------ Web: <http://groups.yahoo.com/group/dodge_intrepid> Subscribe: <mailto://[email protected]> Unsubscribe: <mailto://[email protected]> Moderator: <mailto://[email protected]>Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dodge_intrepid/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dodge_intrepid/join (Yahoo! ID required) <*> To change settings via email: mailto:[email protected] mailto:[email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
