Mystery Symptoms - Guess that problem! (with some knowledge behind it)

lincolnlogs

lincolnlogs

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Here's a few things that i have yet to figure out on my LS.

Video 1.

My Converter/Power issue. Just started within the last few months. no codes, no misfires, nothing. Feels like Im pulling a boat when i want to pass someone, or take off from a light (at a great rate of speed) the engine sounds smooth as ever, not one misfire. (although i had previous coil problems, misfires, and VCG oil contamination) got all that sorted out, now my guess is i killed my converters. at an idle and during accel the exhaust creates a whoosh tone that sounds exactly like a miss during idle. also you can hear what sounds like an exhaust leak up front by converters. (no leaks) during HARD acceleration (like on an entrance ramp, or 0-60 you can faintly smell hot metal sometimes, but they dont glow, or rattle. Engine bay is quiet. (besides AC drag) still getting 17-22MPG. Any help appreciated. listen closely.

Video 1:

http://youtu.be/hlSjSZNYPKM


Video 2.

SUSPENSION CLUNKS -LOUD

no joking here, this road is outside my apartment. the seams here really couldn't be more than 1/2'' offsets. feels like im driving down a flight of stairs. steering is perfect. alignment is perfect. no veering, no pulling, nothing. my guess is struts. yours?

Video 2:

http://youtu.be/GRv-tze0HVg


Video 3.

Are all 3.9 Idles like this?

My overall guesstimate is this is a "Ford" thing. seems like all motorcraft vehicles have this "hanging" idle on start up. am i correct? sometimes it hangs for a minute if it's cold. but i've never been a ford owner, and neither of my other vehicles have done this. anyone know why? is it because of their IACV design? Vs GM's Electronic Throttling Idle?


Video 3:

http://youtu.be/LJNKXq8Vh0E




my ears are open to possible problems/advice!

:):):):):):):):):):)
 
Video 2 - Do you have sport shocks? Since I installed mine there is a stretch of road here that I get these loud thumps when I drive it. The surface is concrete with only small expansion joints, but it was bad enough that the first time I drove on it I thought I had a flat tire by the sound of it

Video 3 - Mine has always done the same. When the temperature gets up it will drop down to around 800 rpm
 
Video 3: Yes, it's supposed to "hang" around 1.5k at startup. All LS's do that v6 and v8. If I read and remember correctly it has something to do with getting the oil flowing.
 
#3 - It's supposed to do that. It's an emissions strategy. I think that you'll find that most LEV and ULEV vehicles do this.
 
regiment1 said:
Video 2 - Do you have sport shocks? Since I installed mine there is a stretch of road here that I get these loud thumps when I drive it. The surface is concrete with only small expansion joints, but it was bad enough that the first time I drove on it I thought I had a flat tire by the sound of it

Video 3 - Mine has always done the same. When the temperature gets up it will drop down to around 800 rpm
Click to expand...



yeah, i have the sport package. small pot holes feel like manholes. i honestly think my car is going to fall apart. if the road is smooth, it rides like a lincoln! but any flaw and youd think i had steel tires.
 
lincolnlogs said:
yeah, i have the sport package. small pot holes feel like manholes. i honestly think my car is going to fall apart. if the road is smooth, it rides like a lincoln! but any flaw and youd think i had steel tires.
Click to expand...

That sounds like it's too rough, to me. I get a little bigger bump over certain potholes, but mostly the ride is very comparable to my old shocks. How old are your shocks?
 
My '03 LS8 Sport has had clunks a few times, and it was always the sway bar end links. I changed the front sway bar bushings, but they were fine. The rear sway bar bushings are loose and do add a little noise. I tried to change them but they are way up there, and the nuts are rusted solid. I won't be able to change them without dropping the cradle, so it's probably not going to happen on my 200k car. My lower ball joints had a terrible groan that sometimes sounded like a clunk. There was no slop in the joint. It must of been dry. I put in Moog problem solvers, and they are quiet. There is still a little noise. I'm not sure from where it comes, but it's bearable at this point.
 
Video 2 sounds too loud to be just shocks, unless they're old a worn out. I'd get under there and check all the bushings and ball joints. Something is off with it. Mine doesn't even sound that bad with sport shocks and Eibachs.
 
#1 sounds like maybe an exhaust leak.

#2 sounds normal (were your windows down?). What type of tires do you have? Size? Make/model? A tire with a harder sidewall will hit harder (a 1/2"+ is pretty large!). Also, concrete is a very loud driving surface. Have you tried driving slowly over those sections and listened?
 
#2:
you need to take that to lincoln or a trusted suspension shop. it sounds too loud for anyone to accurately diagnose via internet IMO.
my best guess would be a combo of sway bar end links and/or sway bar bushings and tires. but it sounds too loud for all that still IMO
 
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