Re: [FWDLK] Vacuum advance

[Bob Moore <remoore@xxxxxxxxxxxxx>]

Hi Nick,

Watch out for the old 'intermittent primary wire' syndrome, aka the little
black wire from the points/breaker plate to the coil, they tend to fatigue
and break right near the points, and usually 'look fine' unless you try and
bend it you may find out it is just connected by the insulation- (or check
with continuity meter DVM etc) this is usually worse when the Vacuum advance
IS working tho- 

Good luck,

-Bob

-----Original Message-----
From: Forward Look Mopar Discussion List
[mailto:L-FORWARDLOOK@xxxxxxxxxxxxx] On Behalf Of Nichols
Sent: Monday, September 03, 2007 9:50 PM
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: [FWDLK] Vacuum advance

I've discovered what I thought was a fuel starvation problem may be an 
ignition problem.   The vacuum advance on my flathead 6 cylinder 
Plymouth engine is not working.  I did a test from a good running car.  
  I installed a long hose to the good running car and ran it to the problem
car's vacuum advance hose and revved the engine on the good car and with the
distributor cap off the problem car I noticed there was no 
movement of the breaker plate.   I could also hear a leak from the 
diaphragm of the vacuum advance of the problem car.   I plan to replace 
the vacuum advance.

Anyway, my question is this:    Would a bad vacuum advance cause the 
engine to die intermittently?  The car idles pretty well and actually
accelerates fine but every so often the car will die at idle or when 
shifting from 1st to 2nd gear(three-speed manual trans.).   Car will 
always restart.   One other note:   Someone had installed the battery 
wrong.    The car is supposed to be positive ground and it was hooked 
up negative ground.   I replaced the points after correcting the 
battery polarity but not the condenser.   The points looked pretty 
fried after only being in the car for one week.  Would incorrect polarity
ruin the condenser and or the coil?


Any thoughts greatly appreciated.   Nick Nichols

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