Re: Need help understanding lean burn and deleting it
[Re: Adam71Charger]
#1699686
11/16/14 04:05 PM
11/16/14 04:05 PM
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Joined: Apr 2012
Posts: 18,880
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RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
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Chrysler Electronic Lean Burn
From 1976 through 1989, Chrysler equipped many vehicles with their Electronic Lean Burn (ELB) system, which consisted of a spark control computer and various sensors and transducers. The computer adjusted spark timing based on manifold vacuum, engine speed, engine temperature, throttle position over time, and incoming air temperature. Engines equipped with ELB used fixed-timing distributors without the traditional vacuum and centrifugal timing advance mechanisms. The ELB computer also directly drove the ignition coil, eliminating the need for a separate ignition module.
ELB was produced in both open-loop and closed-loop variants; the open-loop systems produced exhaust clean enough for many vehicle variants so equipped to pass 1976 and 1977 US Federal emissions regulations, and Canadian emissions regulations through 1980, without a catalytic converter. The closed-loop version of ELB used an Oxygen sensor and a feedback carburetor, and was phased into production as emissions regulations grew more stringent starting in 1981, but open-loop ELB was used as late as 1990 in markets with lax emissions regulations, on vehicles such as the Mexican Chrysler Spirit. The spark control and engine parameter sensing and transduction strategies introduced with ELB remained in use through 1995 on Chrysler vehicles equipped with throttle-body fuel injection.
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Re: Need help understanding lean burn and deleting it
[Re: RSNOMO]
#1699687
11/16/14 04:08 PM
11/16/14 04:08 PM
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Joined: Jun 2013
Posts: 1,521
Tacoma, Washington USA
Adam71Charger
OP
pro stock
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OP
pro stock
Joined: Jun 2013
Posts: 1,521
Tacoma, Washington USA
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Quote:
Chrysler Electronic Lean Burn
From 1976 through 1989, Chrysler equipped many vehicles with their Electronic Lean Burn (ELB) system, which consisted of a spark control computer and various sensors and transducers. The computer adjusted spark timing based on manifold vacuum, engine speed, engine temperature, throttle position over time, and incoming air temperature. Engines equipped with ELB used fixed-timing distributors without the traditional vacuum and centrifugal timing advance mechanisms. The ELB computer also directly drove the ignition coil, eliminating the need for a separate ignition module.
ELB was produced in both open-loop and closed-loop variants; the open-loop systems produced exhaust clean enough for many vehicle variants so equipped to pass 1976 and 1977 US Federal emissions regulations, and Canadian emissions regulations through 1980, without a catalytic converter. The closed-loop version of ELB used an Oxygen sensor and a feedback carburetor, and was phased into production as emissions regulations grew more stringent starting in 1981, but open-loop ELB was used as late as 1990 in markets with lax emissions regulations, on vehicles such as the Mexican Chrysler Spirit. The spark control and engine parameter sensing and transduction strategies introduced with ELB remained in use through 1995 on Chrysler vehicles equipped with throttle-body fuel injection.
Yes I read this kind of info too, Just dont know where these sensors and tranducers and vacuum ports are and which ones need to be plugged, blocked or changed.
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Re: Need help understanding lean burn and deleting it
[Re: Adam71Charger]
#1699688
11/16/14 04:24 PM
11/16/14 04:24 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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No actual exp doing one but I'd toss on a regular carb/dist/wire up the ballast/ecu like it says in the archives ex dont connect the starter relay "ign" yellow wire to the ballast like it says to. I would think most ports are closed & just pull the vac hoses/wires off of em. Just cap everything off that looks suspicious. You only need 1 vac line from carb ported to dist/switched 12V thru ballast to run/brown wire ballast bypass to crank/& I'm assuming the alt field wiring stays the same.
live every 24 hour block of time like it's your last day on earth
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Re: Need help understanding lean burn and deleting it
[Re: Adam71Charger]
#1699691
11/16/14 04:48 PM
11/16/14 04:48 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Not real familiar with the early LB setups, but when I deleted the one on my 87 replacing the carb and distributor was it. Just plug any vacuum lines that you aren't using. The only ones you will use are the PCV line and you will have to run a new one from ported vacuum to the vac advance on the distributor. Anything else can just remain unused.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: Need help understanding lean burn and deleting it
[Re: Adam71Charger]
#1699696
11/18/14 04:19 AM
11/18/14 04:19 AM
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Joined: May 2003
Posts: 1,751
Graham, WA
Polarapete
top fuel
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top fuel
Joined: May 2003
Posts: 1,751
Graham, WA
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 I have already done the same to my '87 D100. The lean burn controlled 2 barrel carb was intermittently flooding the engine to where the truck was undrivable. I replaced the lean burn with the attached item (that was intended for the Ramcharger), went with an old AFB that I had laying around, mounted on an E-brock #2176 that I bought used last year, and an O'Reilly rebuilt '74 Challenger distrib for the vacuum advance. I have a new E-brock #1406 that I will be installing this week and will spend a little more time tweaking it before I am completely happy with it, but for now, for a 318 it is strong!! Since I went with a 4 barrel, I also used the 4 barrel kickdown linkage. I acquired the manifold and kickdown linkage from Moparts sellers over a couple of years time. Take your time doing it because there are a lot of holes to plug  Of course now I have found I could have done the job cheaper with this deal. http://www.designed2drive.com/So I will probably use this kit on the 440 race motor and see how it works out...got to be better than an Orange box with a ballast
1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction
1998 Ram 2500 QuadCab, new daily driver.
2008 Honda Element
2014 Carry-On 7x14 Cargo Trailer
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