Hello all!
For years now I have used this forum to help me diagnose and solve my LS issues -and am sincerely thankful you guys have put so much information out there- but the time has come for me to finally make an account and ask for some input. Right now my 2002 3.9L Lincoln LS (180k mules) has a rough idle after it sits running for a few minutes. It will idle fine for 5 minutes or so then rpms drop from ~1k to ~500, engine almost stalls, then it idles weird, chugging a bit sounds like vroom-0.5 second-vroom-0.5second-vroom.... Checked and replaced most(I think) of my vacuum lines, rubber grommets that the 2 vacuum lines goon top of the engine(throttle body maybe?), plugs, couple coils, gas cap, and fuel & air filter. Had bank 1 bank 2 lean codes this week and misfire that are now gone but still idles weird (only after a few min sitting still). About a year ago I found my plugs covered in oil so I replaced both valve cover gaskets along with plugs, injectors, and coils which solved all my problems until now (seriously can’t thank everyone on this site enough). Now, car is running MUCH better except the idle issue. Upon further inspection noticed a hissing sound from the back of passenger side engine. I was poking around and just barely touched the left hose on the DPFE solenoid (AKA EGR pressure feedback sensor) and it snapped off. Where do the two hoses on the DPFE connect into the exhaust and are there any vacuum lines behind the engine I can’t see that could be the source of the hissing? Any other thoughts on my issue? Thanks!
-Luke
For years now I have used this forum to help me diagnose and solve my LS issues -and am sincerely thankful you guys have put so much information out there- but the time has come for me to finally make an account and ask for some input. Right now my 2002 3.9L Lincoln LS (180k mules) has a rough idle after it sits running for a few minutes. It will idle fine for 5 minutes or so then rpms drop from ~1k to ~500, engine almost stalls, then it idles weird, chugging a bit sounds like vroom-0.5 second-vroom-0.5second-vroom.... Checked and replaced most(I think) of my vacuum lines, rubber grommets that the 2 vacuum lines goon top of the engine(throttle body maybe?), plugs, couple coils, gas cap, and fuel & air filter. Had bank 1 bank 2 lean codes this week and misfire that are now gone but still idles weird (only after a few min sitting still). About a year ago I found my plugs covered in oil so I replaced both valve cover gaskets along with plugs, injectors, and coils which solved all my problems until now (seriously can’t thank everyone on this site enough). Now, car is running MUCH better except the idle issue. Upon further inspection noticed a hissing sound from the back of passenger side engine. I was poking around and just barely touched the left hose on the DPFE solenoid (AKA EGR pressure feedback sensor) and it snapped off. Where do the two hoses on the DPFE connect into the exhaust and are there any vacuum lines behind the engine I can’t see that could be the source of the hissing? Any other thoughts on my issue? Thanks!
-Luke