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Old 08-24-2018, 09:26 AM   #1
Zackaddict
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Default 152 no distributor spark

Hey guys. Learning as I go so go easy one me. I’ve been working on a 1961 scout 80 with a 152 engine.

I’m stumped because I’m getting spark out of my ignition coil(when grounding our the plug wire coming out of the coil) I have 12v while cranking on the + end of the coil and the - terminal will blink(with a test light) while cranking.

But I’m not getting any spark out of the plug wires. I bought need plug wires. Then I bought a new rotor and a new cap but still nothing.

Rotor turns well while cranking.

Any thoughts? Something else I should try?

I just got the scout 80 earlier this spring. It looked like the distributor cap and rotor were new so P.O. Might have mucked around with it. So not sure if maybe they pulled it. Could the timing be off so that it’s firing between plug wire contacts?

Sorry about the novel. Any input would be helpful. Thanks guys!
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Old 08-25-2018, 01:49 AM   #2
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Default Re: 152 no distributor spark

Also I believe itís a delco distributor
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Old 08-25-2018, 02:22 AM   #3
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Default Re: 152 no distributor spark

You're up early today !!!

Well it may very well be a Delco or a Holley or a Prestolite...who knows what it has after 57 years???
Let's find out for sure.
It is important to know which distributor you have in order to:
1. Get the correct tune-up parts at the auto parts store on the first trip, and
2. Each distributor has specific tune-up specs.
However, how about you taking a photo or two or three of the distributor - exterior & interior.

Anyway, while you are doing that, the ignition system is just like any other points/condenser style ignition system of the period, nothing special or different.

Stick to the basics.......

Clean the points contacts, be sure the copper on the rotor & cap aren't burnt. Clean them up nicely. Be sure the condenser wire contact is clean and connected to the points. Frequently it is just dirty or burned points contacts. Use a nail file to clean those contacts up.

Check your firing order is correct 1-3-4-2-1-3-4-2-1-3-4-2-1-3-4-2-1-3-4-2 etc.......it is 1-3-4-2. clockwise rotation.

Cylinder #1 is the most forward cylinder.

If still no joy, replace the points & condenser with new high quality parts,...and clean the points contacts on the new points before installing them. Sometimes they have a light coating on them to prevent them from corroding over long period of storage. Some alcohol on a Q-Tip works well.

You can also check the condition of the spark plugs. Pull them out and look at them, take a photo of them and post it here in the thread. If in doubt, buy a new set: Champion RC-12Y I think?? Hmmmm there are others, but the parts store will have a few options for you. Nippondenso or NGK #3332 I think are a good one too.

Basically don't buy cheap tune-up parts. Buy quality!

Take photos of what is going on and check back with your updates.

I will check back on you later in the day.
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Old 08-25-2018, 02:07 PM   #4
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Default Re: 152 no distributor spark

Hey thanks for the quick reply

How can you sleep with a beautiful international waiting for you in your garage.

I wasnít able to tinker at all because I worked today. I got a few pictures of the distributor though. Iíll post in a few days when I get a chance to tinker with it.

Didnít see any serial number on it but I didnít scrub through the muck.
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Old 08-25-2018, 03:23 PM   #5
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Default Re: 152 no distributor spark

Apparently I donít know how attachments work. Haha
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Old 08-25-2018, 09:14 PM   #6
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Default Re: 152 no distributor spark

OK, thanks for the photos.
That is a GM-Delco distributor, and probably the original unit.
It is very dirty.

It looks like the points, condenser & rotor are fairly new.
Be sure the rotor is installed correctly.
It has a square peg and a round peg on the bottom of the rotor that fit into the distributor.

Check that the ballast resistor is not burned out and is connected to the coil + connection.
That is the small white rectangular item in the first photo.

Q. Has the Scout been running at all since your purchase?
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Old 08-26-2018, 12:02 AM   #7
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Default Re: 152 no distributor spark

Iíve never had it running. The po started work on it but passed away and his wife just wanted it gone.

I replaced the resistor already and itís connected to the + terminal.
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Old 08-26-2018, 12:54 AM   #8
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Default Re: 152 no distributor spark

Quote:
Originally Posted by Zackaddict View Post
Iíve never had it running. The po started work on it but passed away and his wife just wanted it gone.

I replaced the resistor already and itís connected to the + terminal.
Just an FYI, that is info that should be in your first post.

So I am assuming you have a good 12V battery in the Scout and are cranking the engine over with the starter. Correct?

And you don't get any spark at any of the spark plug wires or any of the spark plugs but you do get spark at the coil wire (high tension lead) when it is removed from the distributor cap and placed near a ground. Correct?

I'd like to see the distributor cap just to be sure you have the correct cap. Should be a GM-Delco with the metal window in it for adjusting the points. Photo please.

Also, the Scout may have a resistor wire utilized by IH in lieu of the ballast resistor.
You should check that coil + wire that is feeding the ballast resistor.
You should have two feeds to the coil + terminal.
It can be wired in one of two ways.
One wire will give you full 12VDC during 'start' only and the other wire going thru the resistor will give you around 9VDC during 'run' .
This gives the coil 12 VDC to start and 9VDC to run & drive, keeping the coil & points from burning up.
The 12VDC is to get the engine started, then cuts out when the key turns back from 'start' to 'run' position.

Check it out with a VOM.
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Old 08-26-2018, 01:35 AM   #9
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Default Re: 152 no distributor spark

Quote:
Originally Posted by 1975IH200 View Post
Just an FYI, that is info that should be in your first post.

So I am assuming you have a good 12V battery in the Scout and are cranking the engine over with the starter. Correct?
Yessir

Quote:
Originally Posted by 1975IH200 View Post
And you don't get any spark at any of the spark plug wires or any of the spark plugs but you do get spark at the coil wire (high tension lead) when it is removed from the distributor cap and placed near a ground. Correct?
Yessir

[QUOTE=1975IH200;91821]
I'd like to see the distributor cap just to be sure you have the correct cap. Should be a GM-Delco with the metal window in it for adjusting the points. Photo please.
[/QOUTE]

Yes it’s the one with the metal window. I’ll post a picture of it later tonight.

Quote:
Originally Posted by 1975IH200 View Post
Also, the Scout may have a resistor wire utilized by IH in lieu of the ballast resistor.
You should check that coil + wire that is feeding the ballast resistor.
You should have two feeds to the coil + terminal.
It can be wired in one of two ways.
One wire will give you full 12VDC during 'start' only and the other wire going thru the resistor will give you around 9VDC during 'run' .

This gives the coil 12 VDC to start and 9VDC to run & drive, keeping the coil & points from burning up.
The 12VDC is to get the engine started, then cuts out when the key turns back from 'start' to 'run' position.

Check it out with a VOM.
Yes this the current setup I have. I have a service manual and I’ve gone through the wiring diagram. I believe I have it wired currently in that regard.

A mechanic friend of mine said it needed to be 12v at all times. Glad you could confirm what I thought.

I’m going to use my feeler gauge to find out how much the points lever separates (sorry I don’t know the proper lingo).

Thanks so much for the input so far 1975!
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Old 08-26-2018, 08:50 AM   #10
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Default Re: 152 no distributor spark

One possibility is that the dizzy is installed a tooth off and the rotor is not aligned with a terminal. Also check the coil & plug wires for continuity.
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Old 08-26-2018, 08:54 AM   #11
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Default Re: 152 no distributor spark

Sounds good, I'll let you tinker with it for awhile and await your next update.

FYI, vehicles that have set for months and/or years tend to have gummed up fuel systems....to include the carb, fuel lines, fuel tank, fuel pump & fuel selector that need to be disassembled and cleaned or replaced.

Something to think about if you don't know the history of your Scout.

Also, old gas cannot be treated to make it good. If it is bad, it is bad forever. It is best to get rid of old gas and only use fresh fuel.
I recommend "alcohol free" gasoline if you can find some nearby.
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Old 09-10-2018, 08:56 AM   #12
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Default Re: 152 no distributor spark

Sorry about the delay. Something weird happened when I last tried to post and it ended up not loading properly.

Iíll add the pic of the distributor cap below.


Iíve unhooked the old fuel line for now. Trying to focus on one part at a time.

Focus on spark, then compression then gas then lights then brakes then...


Is there a way to check if the rotor is off a tooth or whatnot and not firing at the correct timing? Are they any markings on the flywheel to indicate the cylinder locations?

Name:  B9BDFA15-5909-455F-96DF-B34751741D80.jpg
Views: 35
Size:  73.1 KB

Thoughts on what to try next?
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Old 09-10-2018, 09:13 AM   #13
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Default Re: 152 no distributor spark

Oh and I found the pat number off the dis Name:  99FA3E82-D4FE-473E-89ED-E4ABA01DA14C.jpg
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Old 09-10-2018, 12:58 PM   #14
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Default Re: 152 no distributor spark

I donít mean to blow up this thread but another note.

I tested the + lead on the ignition coil and while not cranking it was at roughly 5v.

Not sure if thatís the new resistor or it needs more power.
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Old 09-23-2018, 12:45 PM   #15
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Default Re: 152 no distributor spark

Quote:
Originally Posted by Zackaddict View Post
I donít mean to blow up this thread but another note.

I tested the + lead on the ignition coil and while not cranking it was at roughly 5v.

Not sure if thatís the new resistor or it needs more power.
Engine 'off', ignition in 'on' or 'run' position, with a points ignition you should have around 9 vdc at the coil + terminal.

Engine starter engaged, you should have around 12 vdc (full battery voltage) at the coil + terminal.
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