Hi list,
Just a general observation on the DCOE which I wasn't particularly aware of
before and some of you might find interesting.
Before I did some lockwiring on my engine's DCOE I decided to empty the
floatchamber by opening and shutting the throttle to eject the fuel out of
the pump jets (the carb had been removed from the car & I knew any fuel in
the chamber would pour out when I inverted the carb to do the lockwiring).
I always thought that when the throttle was snapped open the pump jets
squirted fuel and that was that. However, on this occasion I didn't simply
open and close the throttle but stopped at the end of each opening. I was
mildly surprised to see how much fuel and for how long it continued to stream
from the jets. I suppose this explains why the DCOE is so effective when the
throttle is floored when driving the car. It also illustrates (at least to
me) that when a DCOE equipped engine has a lean flat spot it is as important
to check the pump bleed back valve (which controls the length of the fuel
emission from the pump jets) rather than just bung in bigger pump jets
themselves.
Daniel1312
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