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pertronic ign,

R

roy prins

Well-known Member
I am working on a ford 8N with a side dist. putting in a pertronic electronic ign. -- got a nice hot spark comming out of the coil but I cant for the love of pete get the spark to come out of the cap to the plugs -- put on a new cap -nothing / put in a new rotor -nothing now what? spark going in but not out !! took the cap off and tried letting the spark jump to the rotor and it would not so that tells me the rotor is OK --- it would jump to the dist. housing like crazy -- I am stumped -- I tried the old cap again and nothing -- it did run when it came in but very badly Roy
 
(quoted from post at 13:52:14 08/12/21) I am working on a ford 8N with a side dist. putting in a pertronic electronic ign. -- got a nice hot spark comming out of the coil but I cant for the love of pete get the spark to come out of the cap to the plugs -- put on a new cap -nothing / put in a new rotor -nothing now what? spark going in but not out !! took the cap off and tried letting the spark jump to the rotor and it would not so that tells me the rotor is OK --- it would jump to the dist. housing like crazy -- I am stumped -- I tried the old cap again and nothing -- it did run when it came in but very badly Roy
Click to expand...

Are you SURE you have the correct EI unit and magnet wheel, even if numbers on box(es) are correct it wouldn't be the first time things got scrambled around.

If the EI parts are not exactly correct for the application or POSSIBILITY installed wrong somehow and spark occurs when the rotor tip is between high-tension terminals it will acct like what you are experiencing.

I have a "distributor machine" and actually have a number of "test caps" in which I've cut holes to observe where the rotor tip is when spark occurs.
 
The centrifugal advance may be locked up or toast. With the rotor on, cap off, ignition off, Rotate the rotor in the direction of rotation. It should move under increasing spring pressure several degrees, maybe 18 or so (don't know the spec.) if it does not turn, or turns and stays, or turns the opposite way, the advance is likely an issue. It will be behind the breaker plate. Jim
 
Seems I've heard this before, somehow the trigger is on wrong, upside down, something assembled wrong so the fire happens when the rotor is between cap terminals.

Look at where the spark is happening, either look at the position of the trigger and coil or rotate the housing opposite the way the rotor turns until it fires, see where the rotor is in relation to the terminals.

If you can't get it, call Pertronox customer service, I hear they are very helpful.
 
(quoted from post at 15:05:18 08/12/21) The centrifugal advance may be locked up or toast. With the rotor on, cap off, ignition off, Rotate the rotor in the direction of rotation. It should move under increasing spring pressure several degrees, maybe 18 or so (don't know the spec.) if it does not turn, or turns and stays, or turns the opposite way, the advance is likely an issue. It will be behind the breaker plate. Jim
Click to expand...

Jim, the point cam and the rotor advance together/their relationship to each other doesn't change, so even if the advance is stuck/worn/broken he should still be getting spark out the high-tension terminals.

NOT to say the advance shouldn't be checked and repaired as needed, but he isn't going to find his "no spark" problem there.
 
Connect a timing light to the coil wire take the cap off and point it at the rotor, have a helper crank the engine see what position the rotor tip in in when it is firing. Likely between the cap towers as wore out said. If no timing light with the cap off hold or position the coil wire close to the rim of the distributor, have a helper crank the engine. Eyeball the rotor tip location when it fires.
 
Yep, the pickup and trigger are not in synch with the rotor position. I've heard of that issue with that ignition on several cars. Unlock the distributor, bring #1 up on compression and point the rotor at the correct terminal in the cap and lock it down.
 
Another way to say the same thing, the Petronics is not interrupting the primary current flow at the same place the old points did.
 
I have installed a couple of dozen of these over the years,mostly in antique cars,but in a few tractors.What I was lectured about,(and didn't listen to at first),was before installing the electronic conversion make sure everything worked correctly with the points before changing.If there were other problems with the point system before,it will still have them after.Now,you do have your plug wires hooked to plugs right? That spark won't jump to the rotor if there is no ground in sight to jump to.Your remark about no spark to the bare rotor meaning it is good makes me think you already know about that.
 
I have turned the dist. back and forth with no luck -- checked everything 20 times -- changed the rotor -- changed the cap --turned the dist. back and forth while turning it over and checking for spark at the same time -- nothing I am just about ready to put points back in!!
 
That is true and known. If the advance is broken, it can be many places. I have seen them with a worn limit post get stuck. If he has turned the
distributor, timing could be anywhere. Could the reluctor on the cam (assumes there is one) be put on upside down! Jim
 
Had a call from a guy just today with the same problem on a green one. Turns out he ordered the wrong petronics for it. Was off by one digit. Might double check if you have the correct one for your tractor.
 
Also how much endplay does the dist shaft have. It lines up sitting but cranking and running the shaft comes up and they don't align.
 

Twirling the entire distributer wont
make a lick of difference when the relationship between the magnetic ring and the rotor is out of time .
 
since the rotor is tied to the engine,, turn the dist till it lines up with the rotor.... then realign the wires as needed..

if too far off, pull dist up and re-time the rotor as need to point to number 1 on tdc... then figure if your 180 out or on the money.

This sounds like the dist was out of timing to begin with...
 
(quoted from post at 22:55:02 08/12/21) Also how much endplay does the dist shaft have. It lines up sitting but cranking and running the shaft comes up and they don't align.
Click to expand...
s bentstick said, be sure you are using the mounting holes intended for CCW rotation, not the CW as shown in the picture.
D5SJDgn.jpg
 
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