12-30-2008, 01:28 AM
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Registered User
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Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
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Of course it does.
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How can they be satisfied at that point...the coil secondary is ISOLATED
from any engine grounds, so it does not get grounded until it completes back to the coil...ISO CIRCUIT. It does not use or need engine ground.
And it is a SERIES circuit...no doubt about it....
Read were I state the secondary is iso from all other circuits....engine ground means NOTHING to DIS waste system. The circuit has to be completed back to the iso winding for any spark to occur.
You want a schematic????
http://www.asashop.org/autoinc/feb97/DIS.htm
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No ..they are not "IN SERIES" ..the secondary winding has a + and - end to the single winding, with a tap on each end ..that does not make it Series or a Series Circuit , it simply makes it a winding with a pos and a neg side,....[ like any other dc coil winding ]...and those taps [ terminals] each feed a plug.. a pos feed for one , and a neg feed for the other...and the base of each screwed into the block... that puts the plugs in SERIES WITH the winding and out of PHASE with each other [ reversed polarity] So , no matter , the completed series circuit requires a spark jump to reach back to the coil. It is a closed loop consisting of 2 plugs and one winding.
The bases of the plug are simply mounted to the block and b/c they are both the threaded portion of the plug, that puts them OUT OF PHASE in the SERIES circuit. The second plug in the series HAS TO fire the opposite polarity than the first...if they fired in the same POLARITY, they would have to be wired in PARELLEL... and if they were in Parellel, then the taps would both have to be the same positive, using the block as negative to complete the circuit...... but they are not the same , they are pos AND neg.......... meaning we have a simple, series circuit..
You will note that my other post states that the coil does not have a CENTER TAP..if it did have one , only then could the coil have TWO pos. outputs, one for each plug..and only then would each plug fire the same polarity b/c the circuit whould then be a PARELLEL circuit.
Look up Waste Spark anywhere and you will see "SERIES CIRCUIT". where the single coil feeds plug 1, on to plug 2 , and back to the coil . ALL ISO and ALL in SERIES circuit.
Here is another one for ya.....pay attention to the engine block being used as a conductor for the seconday series flow..you are correct about the polarity, but not about the series circuit design or the plug phasing...which is the point being made.
http://www.auto-repair-help.com/automotive_maintenance/ignition_coil.php
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A Dalton
Last edited by Arthur Dalton; 12-30-2008 at 03:21 AM.
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