http://www.devilfinder.com
Sunplex Rapiscan Jackson County Mississippi

Those Airport electronic scanner thangys.There was something about that
on WAPT tv news www.WAPT.com a couple or three days ago.I have
known ever since about a year or two after September 11,2001 those
Airport Rapiscan thangys are made in Jackson County, Mississippi Gulf
Coast area.
www.GulfCoastNews.com

Now, I need to figure out what is wrong with the Carter Thermo Quad
carburetor in my 1983 big old Dodge van, engine runs wayyyyy too fast,
won't idle down.
Always some more ''rat killin'' to do around here!
cuhulin

wrote:

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Now, I need to figure out what is wrong with the Carter Thermo Quad
carburetor in my 1983 big old Dodge van, engine runs wayyyyy too fast,
won't idle down.

If it's the same thermo quads that we had on some V8's here in the late
70's and 80's, then I can tell you that one manufacturer put out a
"program" to their dealerships on how to deal with issues. I received a
lot of detail from a friend in my car club who worked in a dealership
back around then. It included all details on setup, but can't recall all
the steps. I do remember that the relationship between the primary and
secondary throttle valves was crucial. They were linked by a rod which
had to be bent at a very specific angle so that the secondary valves
opened in the right relationship to the primary opening. If this
relationship wasn't absolutely spot on, all sorts of problems ensued,
most notably a hesitation on transition to the secondary throttles at
highway speeds.
The program gave instructions on how to make a tool to check the bend on
the throttle link. Apparently, you needed to check and adjust that
relationship FIRST before making ANY OTHER adjustments. If you don't,
then none of the subsequent adjustments will be any good.

Here's some info on the beasts;

http://www.carburetor.ca/Tech/Carter...de-Vaanth.html

There's a lot more info on the quads on the net. Just a matter of
finding the info that suits your version of the carb.

I always wondered why they went for a phenolic resin body on the carb
but it seems it was to do with emission control in the early days. A lot
of the vehicles ran hotter then and the phenolic resin kept the fuel in
the bowl up to 20 degrees (F??) cooler than an equivalent alloy body.

Brings back memories of the old days. Most of the rodders here used to
turf the quads out but they weren't too bad if you knew how to properly
set them up.

Here's some tips for the Chrysler versions.

http://www.offroadexchange.com/tquad.htm

Hope this helps

Krypsis

snip

One barrel and two barrel carburetors, I have had good success at
rebuilding them before, using rebuild kits.I have never worked on four
barrel carburetors before though.On the day before Christmas eve last
week, I was at the O'Reilly's auto parts store on Ellis Ave, I bought a
gallon of Evapo Rust and a spray can of O'Reilly's (brand name)
carburetor cleaner.I got to talking to one of the guys who works at the
store about my carburetor.He said he knows a guy who makes a good living
at rebuilding carburetors.He wrote down his name and phone number and
street address, but I somehow lost that piece of paper.He phoned that
guy, said he will rebuild my carburetor for $145.00.

Tomorrow, I am going to remove the carburetor from my van and I will
phone that O'Reilly's store and ask for the guy's phone
number.Carburetor rebuild kits for that carburetor cost about $35.00
around here.I reckon I will let the guy rebuild my carburetor and when I
get my van running, I will drive over to his place and let him do any
final adjustments, fuel mixture screws, idle mixture screws/
whatever.Yep, I think that is the best bet for me.
cuhulin