Re: Farmall 300 still weak spark ???

Posted by John T on November 29, 2005 at 12:15:06 from (66.244.90.98):

In Reply to: Farmall 300 still weak spark ??? posted by railroadgoat on November 29, 2005 at 09:43:20:

Rail man, YESSSSSSS if you removed the coil wire from the distributor cap (coil end left intact) and placed it within 1/8 from steel and turned her on and used an insulated probe, EACH TIME you open the points (assuming they were closed) the coil will fire AND THAT HAS NUTTIN TO DO WITH ANY TIMING WHATSOEVER.

Sooooooo is that spark good n visible n blue orrrrrrr a weak faint thin wimpy yellow?????

If its good out of the coil but not any plug wires (bare end to 1/8 from steel) the problem HAS TO BE the cap or rotor or the plug wires IFFFFFFFFFFFF when the points just break open the rotor tip is lining dead up with one of the caps internal tower pick ups, is it????? If the rotor tip is in between towers and the spark has to jump such a huge gap, its gonna be weaker.

I say you FIRST gotta get a good spark out of the coil wire,,,,,,,,,,,,,,,, and thennnnnnnnnn see why its not good at the plug wires, such as caused by the wires being bad,,,,,,,,or the caps cracked or carbon traced or moist or dirty,,,,,,,,,,or things are out of time such that when the points break open the rotor tip isnt in line with a tower. Its not too hard with the plugs out to get the engine turned where the points are just opening and then observe where the rotor tip would be in relation to a cap tower AND TS GOTTA BE LINED UP. If it is and the cap n rotor are all good n clean n dry but still a weak spark out of the plug wire ends CHECK THE PLUG WIRES and use wire core NOT carbon core suppressor wires.

One other thing,,,,,,if the condensor is weak but NOT dead shorted, the sparks not as strong as with a good and correct sized condensor, are you sure you have a good and the correct sized condensor????? Also, try a new set of plugs, maybe they are fouled ESPECIALLY if the plug wire end has a good sprak but not the plugs

Let is know n hang in there

John T

Replies:

• Re: Farmall 300 still weak spark ??? railroadgoat 13:13:12 11/29/05 (1)
  • Re: Farmall 300 still weak spark ??? John T 15:50:45 11/29/05 (0)

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