[DML] Re: Vac Solenoid

["content22207" <brobertson@xxxxxxxxxxxx>]

Sounds to me like you've mixed up the firing order.

All vacuum advances are basically inactive at wide open throttle, such
as accelerating uphill.

DeLo spark advance cutoff solenoid is only active at idle anyway (part
of idle speed microswitch circuit). Is used to keep 17 inches of
vacuum off the diaphragm until throttle plates start to open, at which
time it shoots the full remaining vacuum! You could accomplish the
same thing much more smoothly by running vacuum advance from one of
the ported vacuum nipples under the throttle plates.

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, "Dani B" <5n-@xxxx> wrote:
> I just put on a new cap and rotor, and now when I'm driving-especially
> up a hill my engine misfires terribly, it is very embarassing. Anyway,
> I am suspecting the vacuum solenoid, it is the original one, still
> clicks but sometimes it sounds odd when testing it. Anyway-does it
> matter how the wires are connected to the solenoid?- I can't determine
> if I have them on backwards or if they are on right. Is there any
> other ways to better test it?  The cap and rotor are from Advance
> Auto, they weren't Bosch but the parts look exactly the same, I triple
> checked that all the wires were installed deep enough into the cap-I
> didn't check that they were in the right order but I'll do that
> tomorrow. So I don't suspect the cap-maybe I should? Thanks for all
> the help - Dani B. #5003




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