[DeTomaso] Holley Problem

[Art Stephens]

Thank you Ron,

     It is a 4779 (750) double pumper with mechanical secondaries.  I spoke 
to a Holley technician today and he said I could lower my float level in the 
secondary bowl to see if that helps.  He was also talking about a dash pot 
to keep it from stalling.  Before I go the dash pot route,  I'll make sure 
all the parts are functioning properly.  I went out and lowered the float 
level,   then test drove it a couple of times and the situation has improved 
some.  I'll continue lowering and testing until I solve the problem or run 
out of gas.  I forgot to tell the tech guy about the angle of the manifold.

Art



----- Original Message ----- 
From: "Ron Graves" <rlg1973dt at charter.net>
To: <detomaso at realbig.com>; <artstephens at charter.net>
Sent: Monday, March 31, 2008 3:48 PM
Subject: Re: [DeTomaso] Holley Problem


> Right.  Listen to Jack.  My Holley-equipped Pantera never had this problem 
> and I stood it on its nose many times.  There's a gasket, float, or power 
> valve problem.  What model Holley is it?
>
> ---- {0} wrote:
>> In a message dated 3/31/08 8:30:31 AM, artstephens at charter.net writes:
>>
>> > After the engine dies, it blows a little black smoke when I fire it up, 
>> > so
>> > I figure it is flooding out.  How is that happening?  I don't 
>> > understand how
>> > gas is getting out of the bowl and into the intake manifold?
>> >
>> There's a couple of paths into the intake. For instance, a ruptured power
>> valve diaphragm, resulting in gas piddling into the engine whenever 
>> there's
>> vacuum. If your carb was built before about 1985, Holley did NOT include 
>> a power
>> valve-saving check valve in the carb base. And with a substantial pop, it 
>> can
>> still happen, or from simple old age or running your wonderful MTBE in CA 
>> gas
>> for a few years. Or, I've also found loose main jets in a carb or someone 
>> who
>> overhaulded a Holley and used a slightly-wrong gasket between the main 
>> body and
>> jet plate, which exposes passages that sholud be sealed off. But I'd bet 
>> on
>> the power valve. Good luck, Art- J DEryke
>>
>>
>> **************
>> Create a Home Theater
>> Like the Pros. Watch the video on AOL Home.
>>
>> (http://home.aol.com/diy/home-improvement-eric-stromer?video=15&ncid=aolhom00030000000001)
>> _______________________________________________
>>
>> Detomaso Forum Managed by POCA
>>
>> Archive Search Engine Now Available at http://www.realbig.com/detomaso/
>>
>> DeTomaso mailing list
>> DeTomaso at list.realbig.com
>> http://list.realbig.com/mailman/listinfo/detomaso
>
> _______________________________________________
>
> Detomaso Forum Managed by POCA
>
> Archive Search Engine Now Available at http://www.realbig.com/detomaso/
>
> DeTomaso mailing list
> DeTomaso at list.realbig.com
> http://list.realbig.com/mailman/listinfo/detomaso
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVG.
> Version: 7.5.519 / Virus Database: 269.22.1/1352 - Release Date: 3/31/2008 
> 10:13 AM
>
>