Re: [Chrysler300] FW: Chrysler carb question

["Richard Osborne" <richard@xxxx>]

John and All,

I appologize for the late response, I've been away on a family
emergency.

I have a 3800 pound Dodge (not including my 250+ lb. body) that I used
to race. This car went low 12's in the 1/4mile through the mufflers. The
car had and still has a competition ThermoQuad carborator (950cfm).

I tell you this only to qualify the fact I have spent many hours inside
of this beast of a carb. Additionally, I have run a TQ on many other
engines. Based on what you have said, the needle and seat need replaced
as do the floats. 

These carbs have a bad reputation. This is partially due to their
sensitive nature. They respond well to minute tuning.

The condition you are describing tells me fuel continues to enter the
fuel bowls after the engine is turned off, and therefore able to drip
down the venturies of the carb. This is nothing unique to the Thermoquad
when the needle and seat and/or float are faulty, people tend to look at
other possibilities due to the unique characteristics of the carb.

Best regards,

Richard Osborne

>>> "NOWOSACKI,JOHN (A-USA,ex1)" <john_nowosacki@xxxx> 04/07/02
06:15PM >>>


-----Original Message-----
From: NOWOSACKI,JOHN (A-USA,ex1) 
Sent: Sunday, April 07, 2002 6:06 PM
To: Chrysler 300 Club Int'l Listserver
Subject: Chrysler carb question


Hi group,
I have a 74 Jensen Interceptor with a 440 and Thermoquad, so I'm hoping
to
get a little carb advice from the Chrysler community.
The car starts, runs, and idles perfectly.
The problem is that when I shut off the engine, gas continues to
dribble
into the primaries of the carb and really stinks- and I assume this is
also
dangerous. It does this for maybe 5 minutes- long enough for gas to
build
up in the carb and begin to drip out through the throttle plate
bushings
onto the hot intake!!
I removed the air horn of the carb, and the float levels appear normal,
so
it doesn't appear to be a stuck float situation. The gas is coming
from
either the idle ports or high speed ports (or both), not from the
accelerator pump jets.
Are some check balls stuck from sitting too long this winter? 
For those unfamiliar with the Interceptor, it has no electric fuel pump
or
anything else foreign to the Chrysler drive train, which is why I'm
asking
for "Chrysler" help with this problem.
I don't mind doing a carb rebuild, just looking for advice as to what
may be
wrong so I don't miss it during the rebuild.
Thanks,
JOhn 
74 Jensen Int, 61 300G convt.

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