79 Fried Igniter (1 Viewer)

[LimitingFactor]

While trying to track down my lack of spark and the POs rat nest of wiring im pretty sure I fried the igniter assembly.
I followed input on other threads from @Pin_Head and @FJ40Jim in terms of systematically isolating bad components.
Plugs - no spark
Dizzy - no spark
coil would arc when +/- from bat hooked up to it
coil would still arc when igniter assembly + hooked up to coil.
nothing when fully assembly hooked up.
I decided to take the igniter off and troubleshoot it. I flipped the board over and found a burned out trace on the IC. I soldered on a jumper hoping that would fix it. Went to crank it again and burned out another trace..
main questions are:
1. Is this igniter fixable?
2. why am I burning up traces in the igniter?
3. what is the best (simplest) option going forward know the PO hacked into the harness?

 

[Jdc1]

Here’s an economical option: Igniter Repair for Cheapskates

 

[Curt]

You can use an igniter from a carbed Toyota pickup or celica.

Wiring schematic.

http://www.globalsoftware-inc.com/coolerman/fj40/schematics/FJ40/1979FJ40/Haynes1979FJ40Page1.jpg

 

[ToyotaMatt]

I have this :

your welcome to it , just cover shipping

circuit board looks similar ?

matt

 

[S.CarolinaFZJ80]

Subbed
I'm in the same boat. No ignitor.

 

[S.CarolinaFZJ80]

Mine died after replacing plugs, wires, cap and rotor.

 

[LimitingFactor]

Mine died after replacing plugs, wires, cap and rotor.

Exactly what happened to me, changed plugs, no spark.

 

[LimitingFactor]

I have this :

your welcome to it , just cover shipping

circuit board looks similar ?

matt


View attachment 2256317View attachment 2256318View attachment 2256319

Hi Matt, Thanks for the offer. I think im going to try the GM route and if that fails Ill try this again

 

[Jdc1]

Hi Matt, Thanks for the offer. I think im going to try the GM route and if that fails Ill try this again

It’s getting harder and more expensive to keep these things on the road. Purism will have to be sacrificed for the sake of practicality.

@wngrog do the distributors you’ve been running require a coil or ignitor?

 

[wngrog]

It’s getting harder and more expensive to keep these things on the road. Purism will have to be sacrificed for the sake of practicality.

@wngrog do the distributors you’ve been running require a coil or ignitor?

No. It’s all in the distributor.

 

[LimitingFactor]

Okay ordered the GM igniter module today, I want to make sure I understand the wiring before I tear apart the stock one anymore. I am following how @Lugal did it but that igniter looks like the wiring is slightly different. How does my wiring correspond to the connectors on the GM igniter? what is the single component circled it has a single lead which is grounded directly to the battery now, do I need it after going to the new igniter?

 

[Curt]

Could be wrong but that may be the condesnor. Capacitor to cancel noise in the electronics to help with the radio clarity. Most are long gone a this point.

 

[LimitingFactor]

Could be wrong but that may be the condesnor. Capacitor to cancel noise in the electronics to help with the radio clarity. Most are long gone a this point.

Okay thanks, I'll get rid of it then.

 

[LimitingFactor]

Okay hooking up all the connection to the new GM igniter.
My OEM igniter wiring differs from the one in that @Lugal did in his thread.

Dizzy hooked up to W/G pins on the new igniter, pretty straight forward.

unlike the OEM igniter in the other thread, I don't have a yellow wire coming off the circuit board. I have one which goes from the coil + to the connector. Should the resistor be added in line here?

The green wire looks to be a ground. The two wires brown and black, how should they hook to the igniter?

 

[LimitingFactor]

I got everything back together... and still no spark. Anything I am missing here? whats the best order of operations for systematically diagnosing where the problem is?
If I were to completely start over with a clean slate with the ignition system (dist. coil. igniter) what are some of the options?

 

[S.CarolinaFZJ80]

There is a link on here from Trollhole that has a 1980 2f engine manual. In the 138 page PDF, their is an Ignition section from pages 93-98 that shows the on vehicle diagnostic procedures. The distributor section starts on page 98. The USA distributor is on page 105.
You might have a bad signal generator in the distributor.
*Edit - here's the link for the manual.

FSM's

[update: these are no longer available at the links below] MUD now has a Resource tab at the top of the Navigation bar: Resources - https://forum.ih8mud.com/resources/ You may find what you are looking for there. Manuals Chassis and Body 1958-1970 1971 Chassis & Body manual 1975...

forum.ih8mud.com

Here's the signal generator from RockAuto

 

[S.CarolinaFZJ80]

This might help you in your trouble shooting too.

 

[S.CarolinaFZJ80]

I just uploaded the appropriate pages for a US electronic distributor ignition system for you.

 

[S.CarolinaFZJ80]

 

[S.CarolinaFZJ80]

You might want to clean up you coil bracket too as it grounds the ignitor assembly unit to the body.