Jay, You may be correct in your analysis, but there is merit to what Paul is saying. The idle stop screw should normally not be adjusted. The idle air control solenoid (valve, etc.) automatically compensates for changes in engine load at idle such as the A/C compressor kicking on, higher alternator demands, etc. If it is not working properly, you will likely experience problems with stalling as you roll to a stop.
I hope you made your adjustment according to the correct spec for engine idle RPM in gear. As to the flattened intake air plenum gasket: it is possible, but extremely unlikely that this condition originated at the factory. I don't have an alternative explanation, but suffice it to say that the quality control on Chrysler's engines has been based on an automated hot test for each unit since at least the early 1980s. Conditions such as yours would very likely have been detected and flagged for repair. If the problem had existed since the engine was manufactured, I believe it would have manifested itself much earlier. Anyway, here's hoping you have it fixed. If you discover idle problems in the short term, I would put the throttle stop back to where it was and investigate the idle air passage in the throttle body for possible soot build-up. --Geoff On Mon, Jan 5, 2009 at 7:48 PM, J Phillips <[email protected]>wrote: > Paul, > > Thanks for the info. > > I still believe that the intake had a slight vacuum leak from the factory. > Think of this for a second: > > The engine idle RPM's were fine prior to removing the intake plenum. > (Which was being removed to replace a faulty injector.) I noticed the > intake gasket to look like it was not sealing properly and replaced the > gasket. Then without adjusting anything I re-installed the plenum. The > idle RPM's were now so low that the engine couldn't (and wouldn't) remain > running. > > To me, this confirms that there was an intake leak prior to removing the > plenum. Until I was troubleshooting the injector the engine had never seen > a wrench. So, I know everything is factory original. > > Slightly opening the butterfly fixed the idle issue. And it now drives > perfectly fine. We will be taking it on a trip this weekend where it will > have almost (2) tanks of fuel use and I will be checking the mileage. > > Jay > > > > --- On Mon, 1/5/09, Paul <[email protected]> wrote: > From: Paul <[email protected]> > Subject: [dodge_intrepid] Re: 2002 Intrepid SXT / 3.6 ~ Malfunction > Indicator Light > To: [email protected] > Date: Monday, January 5, 2009, 7:27 PM > > > > > > > > > > > > The sticking throttle butterfly valve is caused by carbon > buildup in > > the throttle body. > > > > Just FYI, that throttle plate stop screw shouldn't be adjusted. > > Desired idle speed is achieved by actuation of the idle air control > > valve, which is probably sticking similar to how the butterfly is. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > ------------------------------------ > > Web: <http://groups.yahoo.com/group/dodge_intrepid> > Subscribe: <mailto://[email protected]> > Unsubscribe: <mailto://[email protected]> > Moderator: <mailto://[email protected]>Yahoo! Groups > Links > > > > -- --Geoff Cell: (313)506-7295 Sterling Heights CERT '04 Grand Cherokee | '05 Town & Country http://www.moparmailinglist.com [Non-text portions of this message have been removed] ------------------------------------ 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/
