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Farmall & IHC Tractors Discussion Board

Re: SA electrical problems, part 2


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Posted by John T on November 03, 2009 at 17:06:52 from (66.244.97.31):

In Reply to: SA electrical problems, part 2 posted by Mark on November 03, 2009 at 15:46:46:

Mark, good to hear from ya thinks for the feedback, I wondered how you were coming along..

Okay if the coil wire out the HV top tower on the coil is throwing a good hot blue spark to frame ground each time the points were closed and conducted current but then broke open...BUT THERES NO FIRE OUT ANY OF THE PLUG WIRES WHEN THE CAP AND ROTOR IS INSTALLED......

The problems may be:

1) Wrong distributor cap or caps NOT in the correct time/index/location (check and see if each time just as the points break open THE ROTOR TIP IS LINING UP WITH WHERE ONE OF THE INTERNAL CAP PICK UPS IS LOCATED if it were installed) each time the points break open the coil fires and the internal top HV input towewr (where coil wire goes) DISTRIBUTES the coils spark via the rotor tip to one of the caps 4 towers via the inside the cap pickup

2) Rotor problem like its cracked or shorted out and killing the spark to ground versus hot out to cap towers.

3) Rotor tip is out of index/location so even if cap is correct its NOT lining up with a cap pick up when the poinst break open

4) Cap problem like a crack or carbon trace or oil or dirt or moisture

5) Plugs or plug wires are bad (hard to see how ALLLLLLL would be though lol

6) Some sort of distributor out of time/location problem thats causing the rotor tip to NOT be lining up with one of the cap towers

You gotta get in there and see where the rotor tip is each time the points just break open because it MUST be lining up with where one of the caps internal pick ups woukld be if the cap were installed

If the coil fires and the coil wire is good but when you place it in the cap no fire gets out to any of the plug wires IT SOUNDS LIKE A CAP OR ROTOR OR WIRE OR INDEX/LOCATION PROBLEM OR THE ROTOR TIP IS OUT OF PLACE OR SHORTED OUT

NOTES

1) With that full true 12 volt coil NO EXTERNAL BALLAST IS USED as it was before in the location I highly recommend between the IGN switch output and the coils input

2) I recomnend you wire the coil at the preferred correct labeled polarity for best performance, for Neg ground its lil + receives IGN switch voltage while its other lil - wires to distributor...... For Pos ground its lil - wires to IGN switch and its + to distributor.

Best wishes n God Bless, hope this helps, let us know what you find

PS Make sure the distributor shaft and its cam are rotating as engine is cranked and that the points break open on each high cam lobe as the dist shaft rotates AND SEE WHERE THE ROTOR TIP IS WHEN POINTS BREAK OPEN (in accordance with cap if it were in place)

Each time the points break open, should be 4 times to fire each of 4 cylinders, the rotor tip has to be in right location and so do caps internal pick ups

Ol John T in Indiana


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