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Old 10-03-2013, 07:01 PM   #19
Automotive Stud
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Join Date: May 2010
Location: New Jersey
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Default Re: Ignition problem, could use some insight.

Quote:
Originally Posted by BUBBAS IGNITION View Post
Hopefully when you get the charging system working it will be fixed....

Another bit of info, the car shut off and threw a belt off the front of the engine. Now after hearing more it could very be that the alternator caused this entire problem, maybe a short to ground causing the ignition to just quit etc.???


As others stated , you really got to know your test light and the voltages it will light under. Also the use of a test lamp is positional , meaning the position of the distributor makes all the differences in the world with test light testing.
Ex: If the points are closed ( grounded) then current will flow making the voltage drop high in the ignition circuit causing a very dim test light based on voltage drop across the components.
Makes it even tougher to diagnose.....
staying tuned hoping this one is fixed ......with a new alternator etc ????
Thanks, we'll get this sorted out and see where I'm at. I don't think the belt failure was related. The alternator/water pump belt was still in place, just the fan belt. I didn't replace it when I put the other one on so it was old, it probably didn't like the long ride. I've used this test light on coils before and I knew it should be a little dimmer on the ballast and coil. It was clear I was getting nothing at all.

Quote:
Originally Posted by Bassman/NZ View Post
I'm confused as to how the fan belt got thrown off..... it must have been very loose...
The belt actually failed, it was coming apart but still barely flopping around the fan and crank pulley. Again, I think old age and higher rpms were the cause there. I didn't notice any temperature change but being on the highway kept the air flowing, I've never had problems with this one running hot.
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