[DeTomaso] Carb question

[Christopher Kimball]

I don't mind the fast idle when it's cold--the problem is after it's warmed up and idling correctly, then I turn on the a/c and it drops the rpms way down.
Chris

Date: Sat, 4 Aug 2012 20:20:24 -0400
Subject: RE: [DeTomaso] Carb question
From: michaelsavga at gmail.com
To: chrisvkimball at msn.com
CC: detomaso at realbig.com; jderyke at aol.com

That is what it is supposed to do when the device is working properly, if you don't want that, simply unplug the single black wire which leads into the back of it.  It looks like an oil pressure sending switch with a bolt on it, located behind the throttle linkage.

Michael

Michael 
On Aug 4, 2012 8:15 PM, "Christopher Kimball" <chrisvkimball at msn.com> wrote:






When it first starts, it idles fast because it's cold, but then when warm it slows down to a normal idle speed (wherever I set it previously).  It doesn't gradually speed up once the car is warmed up.

Chris
Date: Sat, 4 Aug 2012 20:10:29 -0400
Subject: Re: [DeTomaso] Carb question
From: michaelsavga at gmail.com
To: chrisvkimball at msn.com

CC: detomaso at realbig.com; jderyke at aol.com

Does it creep up faster, no matter where you set it?

Michael

On Aug 4, 2012 8:06 PM, "Christopher Kimball" <chrisvkimball at msn.com> wrote:




Thank for the tip--I may have a faster-than-desirable idle for the rest of car show season, and get in touch with him when it starts raining again...

Sincerely,

Chris





From: JDeRyke at aol.com

Date: Sat, 4 Aug 2012 18:44:13 -0400

Subject: Re: [DeTomaso] Carb question

To: chrisvkimball at msn.com; detomaso at realbig.com



Chris, I would check with a carb specialist such as Bob at Competition Carburetion -<www.competitioncarburetion.com> that builds Holleys specifically for Panteras with something in the order of 16 different changes from box-stock- not just jetting changes, either! Installed on our Pantera, power went up noticably while fuel mileage ALSO went up by 2mpg. Bob builds all the Pantera carbs for Larry Stock and a couple of other vendors. He has bailed out some Reno area car guys with carb problems, too.









A 408 stroker should have enough torque in hand at idle to withstand the load of an A/C compressor switching off/on without slowing to the dying point, which sort-of points to a too-lean idle mixture. But diagnosing a carb by e-mail is difficult-to-impossible. Bob will probably want you to send him your carb and if you do you will be astounded by the difference.   Good luck- J Deryke



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