Technical Electronic ignition woes

[Good104]

Hi all .
Got an uno fire engine with electronic ignition but no coil ,ecu etc just a little module on the side of the dizzy below ht leads
Would I be able to get an ecu or can I run without one ?
Cheers

 

[portland_bill]

There were no ECUs in those days. The electronics were fully self-contained in the module on the distributor, really just acting as an electronic switch, instead of the mechanical switch of the contact breakers. Should work fine connected to the standard coil.

 

[Good104]

Ah
Thanks.
Just don't want to fry the dizzy or module
Where can I find a wiring diagram do u know ?
My Haynes manual ain't got one

 

[jackwhoo]

Hi, I sold the same distributor with the correct ignition coil to a guy on the forum who also does YouTube vids.
He is in France.
Have a look for his posts and ask him for wiring colours.
Jack

 

[jackwhoo]

@Ben in France

 

[Dragon Man]

hey there, here's one i did earlier.. hope it helps!

and theres this one which is more in detail

 

[Good104]

Thank you!!

 

[binhoker]

ive just solved a no spark problem on a electronic ignition but i am left with some questions. first i suspected it was the coil and my multimeter showed 0 ohms across the primary so it looked like a short. on the bench i could get a spark out of the coil so after watching dragon mans youtube vid on this system i dug a little deeper and it turned out the ignition module was blown. a transistor had desoldered its self from the pcb it must have got hot. i wonder did the unusually low impedance on the coil cause this. i have fitted a spare module and the car is running again but hasn't been for a big run yet.

 

[Dragon Man]

as the coil and my multimeter showed 0 ohms across the primary so it looked like a short. on the bench i could get a spark out of the coil so after watching dragon mans youtube vid on this system i dug a little deeper and it turned out the ignition module was blown. a transistor had desoldered its self from the pcb it must have got hot. i wonder did the unusually low impedance on the coil cause this. i have fitted a spare module and the car is running again but hasn't been for a big run yet.

in my findings, yes it can cause it! i would change the coil out just to be safe. you can also a 20 watt say 1 to 10 ohm resistor to the coil you have now just to take the 0 resistance impact away from the ignition module.. just add it inline on the green wire from the ignition module and coil.

 

[jackwhoo]

The coil for electronic ignition usually has around 0.7 ohm resistance

 

[binhoker]

Was wondering if my multi meter was outa whack. But today the car stopped again the ignition module is hot

 

[binhoker]

the car started once it had cooled down and ive orders a new coil, tested my old coil with a different meter its still 0 ohms. ive a cylindrical coil designed for points it reads 3 ohms maybe try that if i get bored waiting for the new coil to arrive in the post. might be a good idea to keep a points and coil set up in the car incase the problems persist

 

[jackwhoo]

3ohm coil is safe to try so why not.

 

[binhoker]

new coil arrived in the post yesterday it also reads short circuit on both meters. it seams like digital multi meters are not very good at measuring resistances below 1 ohm. also i still dont know what was causing my car to quit. on both ocasions it stoped sudenly after about 30 mins of driving and if left for a short time woud restart. ive fitted new coil and the ignition module is getting hot to the touch i dont think it should be this hot. havent got round to trying thr 3 ohm coil yet but i wont be be going to far without a tool box and a set of spares

 

[binhoker]

old 3 ohm coil fitted and the ignition module seems yo be running cool