1977 chrysler lebaron lean burn question

Does yours still have the big Computer hanging off the air cleaner ?. As I
remember the lean burn came with a 4bbl thermoQuad. The factory used to
swap a two BBL carb/manifold for the lean burn because it was such a
problem. They used a carter BBD style carb. Any 2bbl from a mid 70's 318
should work. I have several 4bbls that will work if you want to change the
intake manifold, several NON lean buurn thermoquads & a aftermarket #9636
Cry specific Carter AFB in good shape, also a factory 77 service manual

.com:


Be careful of which carb you get.

When the dealer replaced the LEan burn on my 80 Lebaron 318, he
installed one that didn't have a vaccum advance port.  Oh the
port was there, it just wasn't connected internally in the carb.
So while all the hoses looked correct, there was no vaccum. The
car ran for two years with no vaccum advance (mostly stayed
parked, till I inherited it).  The two part numbers where
virtually identical, except for the suffix.
You will need to change the dist.  The Lean burn used an
electronic controlled dist.  You need a vaccum controlled dist.
The dealer at least got the dist right.  Using help from posters
on this NG, I did get everything working eventually.
There is a site with instructions on how to change out the lean
burn for conventional.  I can't find it right now, you might try
to goggle it.  I'll see if I can find it later.
To start with, try www.allpar.com

2 bbl might have been a Rochester model.  Also a great source would be
www.dippy.org Dodge Diplomat Farley's Page.

A '77 Chrysler Le Baron would be the same as an 82, 83 2bbl Dodge
Diplomat or Chrysler Fifth Avenue.  All have the same body style, they
are "M bodies".

In California because of very stringent rules about smog modifications
such as stripping off lean burn computer would violate state smog
rules.  Problem is lean burn computers are often faulty and don't do
the job properly and you fail sniffer test; though you won't have
visual/tampering failures as long as all the hardware is on correctly.

Steve


Nirodac wrote:

The modification was legal in Ca per CARB ONLY if done by the dealer,
Didn't mention dist because he is already changing it. Had a 77 Aspen
Wagon with lean burn system, bought it super cheap in 1990?  as a fixer
upper Ended up Junking the body.
A friend has a 71 Charger special ordered from factory  440/6pk IT
wouldn't pass the tailpipe sniffer even when it was brand new. Haven't
seen him in 5 years last I knew he still had it. IT had like 40k original
miles

ok guys thanks for the info, and sorry for my late replys...

~yes, it still has the big computer on the air cleaner, and as far as i
know this car is all original, but it could have been changed

~im still a little confused as to exactly what carb to get... could
someone tell me if summit racing has the carb i would need, and its
part number? i love summit lol

~i dont live in cali, so i dont have to worry about that crap. hell...
i dont even have any kind of emissions test :)

thanks again

crioten@yahoo.com wrote in


My former lean burner 318, now uses a Carter BBD-8292S.
Not spectacular performance, but good gas mileage.
Manual says you can also use a Carter TQ-9372S or TQ-9364S
these are thermoquads.

Beyond that, and from summit, I can't help you.

cool, thanks for the info....

where is the best place to get those? id rather order it from the net,
so any web sites would be great

thanks again

Back to your original post.  Change the dist & install the electronic ign,
see how it runs.. I have not see that manny lean burn systems. The one's I
have seen & THE 77 factory book diagrams show it as using a 4bbl thermoquad
carb IF you indead have a two bbl carb,  part of it may have already been
eliminated