[DeTomaso] Engine cuts off and cooling
Garth Rodericks
garth_rodericks at yahoo.com
Wed Sep 12 10:56:53 EDT 2007
<<< Second thing that showed up was that in a hard brake and down shifting and turning
hard left the engine died. I popped the clutch and it fired up. Can this be carburetor related
and have anything to do with the engine running cold? >>>
It's definitely carbureetor-related and a common problem with Panteras. The engine in a
Pantera sits level (flat). However, the intake manifold was designed for a front-engined
car, where the front of the motor tilts up slightly. This causes the rear of the carburetor to sit
higher than the front in a Pantera. When the float levels are set using conventional
technique (raise the floats until fuel dribbles out the hole in the side of the bowl), the rear
float ends up being WAY too high.
When you stomp on the brakes, gas from the overfilled bowl spills up and out of the vent
tube (even if you have vent tube extenders or 'whistles' inside the float bowls), and then
dribbles straight down into the mouth of the carb. This causes the engine to flood and die.
The short-term fix is to lower the rear float bowl level. Jack DeRyke and Mike Drew
recommended that I run a piece of fuel line between the front and rear vents, and cut a vent
hole in the center of the fuel line. I haven't getten around to it yet, but Mike tells me that
when he stomps on the brakes, excess fuel that blows out of the rear bowl merely drains
into the front one, and the motor keeps on running.
Cheers!
Garth
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