>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 >> >> ----------------- http://www.imperialclub.com ----------------- >> This message was sent to you by the Imperial Mailing List. Please >> reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be >> shared with everyone. Private messages (and attachments) for the >> Administrators should be sent to iml.webmonster@xxxxxxxxx >> To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm >> > > > >----------------- http://www.imperialclub.com ----------------- >This message was sent to you by the Imperial Mailing List. Please >reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be >shared with everyone. Private messages (and attachments) for the >Administrators should be sent to iml.webmonster@xxxxxxxxx >To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to iml.webmonster@xxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm