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

[sosmi@xxxxxxxxxxx]

IF you're really intent on keeping the Lean Burn system, before you op for a new control unit, check the EGR valve and the vacuum operated heat cross over valve in the left exhaust manifold. You should remove the EGR valve to check for carbon deposits that can hold the valve open.If the poor idle conditions are a lean condition, then feather the choke blade shut very slowly, if the idle improves then you're lean. Thats a carb, EGR, or a possible vacuum leak.It could also be low speed ignition issues with the lean burn.As far as exhaust, any good custom exhaust shop should be able to "Build" what you want. Ya'll have a nice day, Dave.

 

> -------------- Original message -------------- 
> From: "Thomas A.Nedelka" <eesigns@xxxxxxxxxxx> 
>
> > 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, th
> e 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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