[DeTomaso] Resurrection

Jerry Knotts knottsj at galstar.com
Sun Apr 14 09:27:52 EDT 2013


Charles,

I have found MSD boxes to be very voltage dependent.  Anything less than 
battery voltage gives unpredictable results.

jerry knotts


On 4/14/2013 8:16 AM, Charles McCall wrote:
> 1) ..and on the third day, they pushed the rock aside (opened the garage
> door) and found the cave empty with the exception of a loincloth (California
> Car Cover). The Pantera has come back to life again, for the first time of
> the year!
>
>   
>
> 2) Resurrection of a subject kicked around last year but without coming to
> conclusions.. My engine for the past couple of years has had an intermittent
> problem where it feels like a couple of cylinders cut out. I'd like to
> resurrect the subject to see if we can come up with some new ideas.
>
>   
>
> At first I suspected it was a fuel issue, and disassembled the carb. I did
> find a lot of very fine powder in the float bowls, which I cleaned out, and
> installed a fuel filter.
>
>   
>
> I changed the spark plugs to rule out a fouling or failing plug. I haven't
> changed the wires.
>
>   
>
> Symptoms - car can run fine for hours or days or months. Then it feels like
> a switch has been thrown and one or perhaps two cylinders stop firing. I
> have to put my foot into it to keep the engine running. Black smoke comes
> out the exhaust, and it I let the revs drop below 2000, the engine will die.
> This may last for as little as 5 minutes, or as long as 20, although the
> rough running tends to be interrupted by arriving at my destination. But as
> quickly as the problem arrives, it suddenly heals itself, the engine goes
> back to firing on all cylinders, idles happily at 1000rpm, and all is well.
> Perhaps for a day, perhaps for a month, or perhaps for an hour.
>
>   
>
> My engine - 351C, Compcamps 282S cam, Aussie 2v closed chamber heads, Weiand
> Excelerator intake, Holley 700DP, MSD 6AL, MSD coil. Motorcraft AF42 plugs.
> MSD plug wires.
>
>   
>
> We had just started talking about whether MSD boxes could act like this when
> the thread dropped off last year. If this isn't fuel related and is spark
> related, what can I check?
>
>   
>
> Thanks!
>
>   
>
> Charles McCall
> Raising Pantera Awareness Across Europe
> 1985 DeTomaso Pantera #9375
>   <http://www.poca.com/index.php/gallery/?g2_itemId=2323>
> http://www.poca.com/index.php/gallery/?g2_itemId=2323
>
>   
>
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