[AMC-list] BBD Carb Issues

[ksiroonian@xxxxxxx]

HI All.
I have an  83K miles, 81 Concord 4dr with the 258/2bbl BBD  carb, and since I got it, from an original owner, over 6 years ago now,
 it has run great. starts easily even after sitting for a while. Only occasionally does it stumble a bit after running on the highway and the slowing down but it does not stall, and lately it has not done that, since I use use shell gas and also put some techron fuel additive in the gas tank this spring.  In the cold winter in Boston, the car does not get used much, so  I put in Fuel stabil. And after sitting all winter for a few months, a few raps on the gas pedal and she starts up. I changed the fuel filter and make sure all the emission control and vac lines are all good and tite. Dirt in the wrong places on this carb is an issues but so far I have been lucky. I have an 80 pacer wagon and an 85 eagle with that same carb and they have been sitting for a while in storage so i know I will have to attempt a rebuild on those units,  when I get them put back to life. Glad someone said it was not too hard, and kits are available.
FYI, Check Google for  an article on the best gas brands sold in your area that are "Top Tier" gasolines that have the most  cleaning agents and additives in the gas, above the  gov't minimum that is required of all gasolines. Shell is the only one in the NE that is a "Top Tier" so that's why I try to use is when I can and when the price is close to other brands.
regards,
AMCKen/Boston.
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Message: 1
Date: Wed, 11 Nov 2009 12:22:58 -0800
From: Jim Blair <carnuck@xxxxxxxxxxx>
To: <amc-list@xxxxxxxxxxxx>
Subject: [AMC-list] Carter BBD (was Re:  AMC-list Digest, Vol 8, Issue
    22)
Message-ID: <SNT117-W2829644E774EED5E8C9D03ACAA0@xxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"


I have rebuilt many of the BBDs and only ran into 1 I couldn't fix. First, make 
sure the through body screws are tight (if you can twist the carb by hand, they 
aren't) Then I cross #1 and #6 plug wires at the dist with the air cleaner lid 
off and backfire it several times. That usually clears out the idle tubes.
?? I add a filter before the fuel pump that is designed for EFI and a regular 
one by the carb after that with the third line upwards (that filter also 
controls fuel pressure on post '77 fuel pumps)
?? I currently have 1 BBD from a 75 Pacer I bought to rebuild (till I found the 
linkage was wrong to fit my Jeep) and several Jeep ones (which I think are the 
same as my Spirit, but without the computer plug)
?? Keeping the crud out of the BBD seems to keep them running well. I unplugged 
the computer on my Spirit and it ran well the last 3 months I had it on the road 
(I have a sediment bowl that had to be dumped once a week due to the rusty tank 
that I changed a month before pulling it from the road to work on it and I had a 
see through plastic filter after that which got replaced once a week)
?? I have a 2100 Motorcraft to build and put on along with the adapter, but I'm 
switching over to EFI as soon as I can. I already have the 2wd AW4 ready to go 
in.

Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10

From: Marc Montoni <Freedom@xxxxxxxx>
To: amc-list@xxxxxxxxxxxx
Cc: Richard Estermyer <javelinman74@xxxxxxxxxxx>
Subject: Re: [AMC-list] AMC-list Digest, Vol 8, Issue 22
Message-ID: <5.1.0.14.1.20091110233836.03c61ec0@xxxxxxxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
 
 
Richard Estermyer <javelinman74@xxxxxxxxxxx> wrote:
 
 
>Also trying to find out what other brand carburator, than the Carter on my 
Concords could be used?  Both have trouble idling and running and I am not sure 
IF it is worth rebuilding a Carter or to move on to another.  Does anyone know 
the cfm for the 6cyl?
 
 
I just rebuilt the BBD that was on my 79 Spirit liftback a couple of months ago.  
I could have just pulled the needle and seat to clean them (needle kept sticking 
due to old gas) but figured it deserved a good cleaning and overhaul.  I was 
glad I did it!  The insides were filthy.  Once cleaned up and reassembled, you 
couldn't tell it from a new one.
 
Rebuilding is not that hard, and it is *by far* the cheapest way to get a good 
carb on your engine.  The rebuild kit was twenty bucks.  The only other thing 
required is one of those one-gallon cans of carb/parts cleaner.  That stuff will 
take the hair off your...  uhhh... never mind!
 
I have only rebuilt one other carb (a 2-bbl Solex on a VW Dasher, back in 1983 
or so) and the BBD was easier to work with than the Solex.  
 
Anyway, the kit came with absolutely everything and the instructions were clear 
(although I didn't read them until after I was done).
 
-- Marc
 
P.S.  Side note: I much prefer the two-stage (one barrel normally supplies 
engine; secondary opens only when needed, as in a typical 4bbl) Solex over the 
single-stage Carter (both barrels supply engine at all times).  I would think a 
two-stage would provide better gas mileage as long as you can keep your foot out 
of it.  Does anyone know of a two-stage 2-bbl carb that would be a bolt-on on a 
2bbl AMC six cylinder manifold?
                      
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