1975 FJ55 No Start, No Spark, No Understand (2 Viewers)

[120mm]

My 1975 FJ55 was running well for the last year, when it suddenly refused to start.

I've been trying to wrap my brain around cause; and when I touch the HT wire from the coil to the engine block, I get no spark.

I have 11.25 V with the key on to the coil, as well as coming out of the HT.

I did a resistance test and primary circuit is 2.4 and secondary is 10.71

The wire coming from the starter to the coil is disconnected and hasn't been for the last year; maybe a couple inches of wire stick out going nowhere.

I'm confused about what ignition assembly went on what model year, so I've attached a pic of my coil assembly. Looks like a ballast resistor and igniter job.

I've read a bunch of threads on this subject and am frankly confused about what to do. Depending on what you read, the coil is either bad or good. Any thoughts on what to check?

 

[Ian Macdonald]

Just a thought. My son's truck refused to start yesterday. Turned out it was the wire from the coil to the dist. that was faulty.

 

[120mm]

I suppose it wouldn't hurt to give it a tune up. New wires, points and dizzy cap.

 

[Tancruiser]

I would check the fusible link.

 

[Ian Macdonald]

On my truck, replacing the dist. solved a no-start issue.

 

[120mm]

I would check the fusible link.

Where would you look for such an animal? I can't seen anything resembling the one that was in my 80 series.

 

[Solace in Solitude]

So Drew, are you saying... the starter turns the engine, but the engine doesn’t start?

Not the fusible link if the key makes the starter turn.

Dumb question... you know the coil to dissy wire is not connected to the coil, right?

 

[Solace in Solitude]

Where would you look for such an animal? I can't seen anything resembling the one that was in my 80 series.

It would be between battery+ and harness in the PS apron

 

[120mm]

So Drew, are you saying... the starter turns the engine, but the engine doesn’t start?

Not the fusible link if the key makes the starter turn.

Dumb question... you know the coil to dissy wire is not connected to the coil, right?

Starter turns fine. And yes, I disconnected the HT lead to test it.

It would be between battery+ and harness in the PS apron

What's a "PS apron?"

 

[Solace in Solitude]

On my iPhone, your starter looks small... like a gear reduction starter, from an FJ60.

If that’s the case, you don’t need the third wire.

Make sure your starter case is cleanly grounded to the PS frame... probably near the clutch slave cylinder.

This (your second pic) looks like a fusible link... is the black burned or just the pic?

 

[Solace in Solitude]

Starter turns fine. And yes, I disconnected the HT lead to test it.



What's a "PS apron?"

Passenger side

The fender apron... the harness runs along the PS apron

 

[120mm]

On my iPhone, your starter looks small... like a gear reduction starter, from an FJ60.

If that’s the case, you don’t need the third wire.

Make sure your starter case is cleanly grounded to the PS frame... probably near the clutch slave cylinder.

This (your second pic) looks like a fusible link... is the black burned or just the pic?

View attachment 1809046

All the underhood wires and connectors look like that. It's just old and grungy. Frankly, the whole wiring shooting match needs replaced.

 

[rkymtnflyfisher]

 

[Solace in Solitude]

Starter turns... does it sound like the starter’s engaging... but the engine isn’t firing?

Are you sure the carb is getting fuel?

If you don’t see oil dumped around your coil, the coil is probably fine.

I would clean the major grounds, battery- to PS frame (behind front PS wheel) & starter case to PS frame.

So, with HT wire connected to coil, key turned causes dissy end of HT to NOT spark?

 

[120mm]

Starter turns... does it sound like the starter’s engaging... but the engine isn’t firing?

Are you sure the carb is getting fuel?

The engine is turning over like mad when the key is turned and the starter's engaged.

It smells flooded and when I touch the inside of the carb, my finger comes away with we gas.

If you don’t see oil dumped around your coil, the coil is probably fine.

Bone dry around coil

I would clean the major grounds, battery- to PS frame (behind front PS wheel) & starter case to PS frame.

So, with HT wire connected to coil, key turned causes dissy end of HT to NOT spark?

While my wife ground the starter, and the engine turned over like mad, I touched the dizzy end of the HT to the block, and got zero spark.

 

[Solace in Solitude]

Well... it certainly sounds like an electrical issue... the wet gas in the carb is probably just the result of a lotta cranking.

I’d do as you mused... at a minimum, new wires... and clean your grounds.

This link is to @Coolerman ’s schematic fragment that shows your coil, igniter and dissy... you might trace each wire and make sure the connections are good. http://www.globalsoftware-inc.com/coolerman/fj40/schematics/FJ40/1975FJ40/Image-20.jpg

 

[120mm]

That schematic may as well be in swahili. It has the word "distributor" just randomly printed with out reference to anything, for instance.

 

[Solace in Solitude]

It’s Pig Latin... I thought that was appropriate.

You stillrecognize a bullseye, right Drew?

That the distributor.

 

[120mm]

It’s Pig Latin... I thought that was appropriate.

You stillrecognize a bullseye, right Drew?

That the distributor.

View attachment 1809066

The round thing, about a foot and a half away from the word "distributor?"

I have to admit, I simply don't understand electrical schematics.

They don't even remotely resemble real world wiring, and most lack contextual information that would make them understandable.

 

[Solace in Solitude]

BY - Black/yellow stripe
B - Black
R - Red
WB- White/Black stripe

Shows you what color runs where

You could just make sure it’s all connected, from component to component.