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Att'n Allan in NE

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Johnnie T

12-11-2006 12:17:31




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Allan I am the one from the Oliver forum w/ the elect ign problem on the 1850 gas. It was running just fine, feeding cattle when for no reason it died. Checked gas ok, then spark at coil no spark, though bad coil replaced coil same problem.checked voltage at resitor seemed a little low changed it out, same problem. looked at instructions that I saved from when I installed elect. ign. noticed that I should have red wire coming hooked to + side of resitor, not coming from + side of coil, tried that some spark but mostly when I would stop cranking. Replaced coil again w/ coil w/ internal resitor, helped some but still not enough. Tried my 770 w/ point system and boy what a hot spark knocked the &*^%$# out of me. Will try again tuesday with a new 1000 amp battery and cable and new wire from battery to switch and see if that helps. Hope this makes some semse. This by the way is Petronix system, and I called the Petronix 1 800 # and they told how to check the ignitor it checks ok, but have ordered a new one but has not come in yet. Thanks in advance and any help will be greatly appreciated

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Johnnie T

12-11-2006 17:40:02




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 Re: Att'n Allan in NE in reply to Johnnie T , 12-11-2006 12:17:31  
Bob dist. shaft turns, the magnet wheel is what I think is the black plastic ring with a green tape at the bottom & it is all the way down & appears to be lined up w/ the ignitor, now about the air gap, the ignitor is fixed to the plate with small bolts hold it in place & tight to dist body there is no way to adjust the air gap that I can see there is no gr.jumper wire just a red wire to + post & black to - post of coil distributor is tight & was installed new 2 yrs ago. I am thinking about installing a new gr. from battery to starter mounts and see if that helps the problem, but at this time I don't think I have agr problem Thanks for all of the help.

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Johnnie T

12-11-2006 13:36:23




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 Re: Att'n Allan in NE in reply to Johnnie T , 12-11-2006 12:17:31  
This thing was working just fine till the other day I have around 9 to 10 volts when cranking, when I turn on the key I hear a spark in dist, if I remove ignitor from dist and still hooked up touch to side of dist with key on I get a small spark is this normal. Some time I will get agood spark and when I stop cranking I get one spark but it appears to be weak.



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Bob

12-11-2006 13:55:32




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 Re: Att'n Allan in NE in reply to Johnnie T , 12-11-2006 13:36:23  
I WOULDN'T be taking the Ignitor out of the distributor, while it's powered up, much less repeatedly touching it to ground at the same time!

If it wasn't already bad, I suspect doing those things will lead to "letting the smoke out of it"!

A DUMB question, I'm sure, but is the distributor shaft turning as the engine cranks?

Is the magnet wheel intact, and pushed down over the point cam, lined up with the Ignitor, and is the air gap correct?

Have you checked, per my previous post, whether it is well grounded?

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Allan In NE

12-11-2006 14:01:19




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 Re: Att'n Allan in NE in reply to Bob, 12-11-2006 13:55:32  
Yes,

Don't be playin' around with the thing. Make sure it is hooked up correctly and grounded good as stated earlier and have it all put back together.

Then, and only then put the juice to 'er.

You already know the tractor runs good with the points so the only other thing left stopping the tractor from running is that little pickup thingy.

I think I fried mine when I hit the starter button when the dude was hangin' free off the distributor. They just can't stand that.

Allan

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Bob

12-11-2006 12:37:16




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 Re: Att'n Allan in NE in reply to Johnnie T , 12-11-2006 12:17:31  
Are you getting only ONE hot spark when you stop cranking?

That can be a symptom of a shorted module.

Also, have you been monitoring the primary voltage to the coil, to be sure it is holding up, even while cranking?

And, one MORE thing... the Ignitor module needs to be grounded. It bolts to the breaker plate, then the breaker plate has to be making good contact with the distributor body (sometimes, there's a ground jumper wire), and the distributor body must be making clean metal-to-metal contact with the engine block. Poor ground to the Ignitor mounting base = weak or NO spark.

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Allan In NE

12-11-2006 12:30:03




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 Re: Att'n Allan in NE in reply to Johnnie T , 12-11-2006 12:17:31  
Yes Sir,

All I can do is relate my experience with ya, which was just about the same deal as you had.

Bottom line is that the pickup is history. It's shot. Take this to the bank, it is no good. That is exactly how mine acted.

That little gizzmo is very sensitive to the correct polarity, the correct voltage and also, you must have very good grounding on your tractor.

Allan



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Allan In NE

12-11-2006 12:31:32




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 Re: Att'n Allan in NE in reply to Allan In NE, 12-11-2006 12:30:03  
Johnnie,

I run a straight 12 volts on mine and threw that resistor in the weeds. Since the replacement pickup was installed, no problems to date.

Allan



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Bob

12-11-2006 12:50:29




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 Re: Att'n Allan in NE in reply to Allan In NE, 12-11-2006 12:31:32  
Allan,

You must have a coil with a fair amount of primary resistance, or a Pertronix IgnitorII unit.

The original Ignitor will only tolerate a coil with a fair amount of resistance (I can't remember the exact figure), and a coil with less resistance will cause all the smoke to be let out of the $$$$ module. Don't ask how I know this!

The Ignitor II is smart enough to work with low primary resistance coils, making for a HOT spark, without losing all it's smoke!

What REALLY ticked me off, though, was a Ignitor II unit for a special-order application (Ford grain truck that originally had factory EI) that "went south" about the second day into harvest.

All was done according to the book... the unit was used with a new approved coil. Apparently, the unit was "new defective", but that didn't make the customer very happy, or myself, for that matter, when we had to rig up another ignition system to get him through harvest!

(The wiring for the truck's original equipment electronic ignition system was destroyed in a cab fire, and we put in just the basic wiring, and special-ordered the IgnitorII to replace the complicated Ford system that had been "toasted".)

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