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

["Thomas A.Nedelka" <eesigns@xxxxxxxxxxx>]

>From: Stevan Miner <miner@xxxxxxxxxxx>
>Date: 2007/08/25 Sat PM 09:21:34 CDT
>To: mailing-list@xxxxxxxxxxxxxxxx
>Subject: Re: IML: Lean burn and exhaust help

Thank you very much. The mechanic told me that the purpose of the who sensors/lean burn is to advance timing, and that I am not getting any timing advance off idle.  He just rebuilt the carb, and it feels right except for right off idle, where it stumbles most of the time.  I will check for the grounding of the tps, and then take whatever info I can to him.  I need to be careful not to come across like an expert, especially since I was an English major.
Tom
>Hi Tom,
>The Lean Burn system is one of the most misunderstood systems that Chrysler 
>ever made. It really doesn't have any thing to do with the fuel system so 
>chance of it causing any idle roughness or stumble is remote. It is used to 
>electronically control the timing which allows a leaner fuel mixture thus 
>better mileage. The number of control boxes I've replaced I can count on one 
>finger as they don't go bad all that often. I've had pretty good results by 
>running the carb a little richer to eliminate stumble and rough running. The 
>fuel available today isn't any where close to what was back in the 70's. In 
>the center of the metering rod hanger is a set screw which if you turn 
>clockwise will raise the rods out of the jets giving a richer mixture. Don't 
>get carried away, usually 1 to 2 turns is plenty. Also make sure when you're 
>setting the base timing, make sure to ground the stop on the carb 
>transducer.
>Stevan Miner
>Miner Auto Service
>Winnebago, MN
>----- Original Message ----- 
>From: "Thomas A.Nedelka" <eesigns@xxxxxxxxxxx>
>To: <mailing-list@xxxxxxxxxxxxxxxx>
>Sent: Friday, August 24, 2007 3:50 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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>
>
>
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