Re: IML: Lean burn and exhaust help...

["howard" <parkerc@xxxxxxxxxxxxxx>]

Thomas,
I also have a 78 NYB with lean burn. Looking on the passenger side of the 
carburetor towards the bottom, you will see the "THROTTLE POSITION 
TRANSDUCER" as it's called in the service manual. It is black, round and 
about a inch and a half long with two electrical contacts on one end and 
there should be a tiny wire (cable) extending from the other end connecting 
to a lug on the carburetor. Check and see if this tiny wire (cable) is there 
and hooked to the lug. If not, it is going to run rough even though 
everything else checks out. This thing is very easy to over look. Sorry I 
can't explain it better but I'm 17 and not a mechanic. I don't know the 
correct terms but this is what I found to be the problem on mine.
Fixed it once and couldn't leave well enough alone and broke the cable 
again. By the way, if anyone has one of these TRANSDUCERS (it's in the 
service manual) part number 3874648...I NEED ONE! You throw these words 
around  the part houses here, and they think your nuts.

Best Of Luck.
Chad Parker
parkerc@xxxxxxxxxxxxxx
78 NYB with St Regis Pkg
65 Imperial LeBaron
65  Imperial Crown Coup
----- Original Message ----- 
From: "Thomas A.Nedelka" <eesigns@xxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Friday, August 24, 2007 2:50 PM
Subject: IML: Lean burn and exhaust help...


> If anyone can help..I have a 78 NYB with 400/4bbl and lean burn.  The car 
> cameout of Calgary two summers ago with only 10,500 original miles/1 
> owner. I am trying to keep it as original as possible.  I had the carb 
> rebuilt by a top Chrysler mechanic, and it has helped the roughness off 
> idle, but not solved it.  He replaced the Throttle Positioning Sensor as 
> it was not sending any signal, and reports that the other sensors that 
> feed the Lean Burn are working, so the rule is then to go to the Lean Burn 
> box.  IT is part # 4111278, both from the book and from the existing box. 
> I do have the Lean Burn replacement kit, but prefer not to use it.  Any 
> idea where I can get this, or get it repaired?
>
> Also, the tail pipe separated at the muffler, and I want to replace it all 
> from the Y pipe back(extension, muffler, resonator, etc) to get it right 
> and keep as original as possible. The car was build for Canada, and does 
> not seem to have had a Cat Converter.
>
> The car now has about 20,000 miles, with almost all original parts, and 
> paint.  It is stunning, including the factory sunroof.
>
> Thanks for any and all help.
> Tom
>
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