83 Brat- No spark from coil. Electrical insight needed!

[Greenley]

I acquired a new project BRAT,

with the understanding that it wasn't

getting fuel to the carb, or spark.

The engine cranks with ease, with the key

turned all the way clockwise-

or turned all the way backwards to lock-

which tells me someone fudged with the ignition

lock cylinder at some point

 

FL 2 and it's thick gauge white wire, is where i see a possible issue.

There is a small bit of melting of the plastic box, near the spade terminal.

From what i gather, this wire goes to the pink ignition switch connector.

Which is in fine shape itself.

 

I've swapped in a new FPCU or Revolution Sensor-

and i now have fuel in the lines while cranking.

 

Also, i've inspected the fusible links themselves, and they're fine.

Unbolted it, checked for corrosion on the underside and there's none.

Fuse #5 is good.

It's not the coil, or noise condensor.

I'm getting pulses from the disty.

 

I have a multimeter at my disposal.

Is it possible to create a new circuit here and create spark?

Or how should i go about tracing the issue?

 

Thanks, USMB

[GeneralDisorder]

Do you have power at the positive side of the coil when cranking? If not then you need to get ignition switched power to the coil +.

 

You should check the coil primary resistance - should be about 1 Ohm (between positive and negative terminals). Then check the secondary resistance - should be about 10,000 Ohms - between either of the posts and the coil wire tower. If it fails replace the coil.

 

If it passes that test - put a test light between the negative battery terminal and the negative post on the coil - it should pulse on and off when you crank the engine over. If it fails replace the ignition module in the distributor.

 

If it passes all those tests - you have bad plugs, wires, cap/rotor, etc downstream from the coil. Should be simple to check.

 

GD

[Cougar]

You state that you have pulses coming from the disty and the coil is good. If that is true then it seems that the trouble would have to be a bad coil wire going to the distributor or something is wrong with the rotor in the disty.

[BugMeNot2]

This is greenley, I haven't been able to login with my username since updating my email address....

 

So I do indeed have pulses from the - side of coil...

I was able to get a spark from the HT lead, by jumping the coil

 

I replaced the disty leads, and the rotor spins when cranking...

 

Cougar, what does this all mean.

[Cougar]

You say you jumpered the coil and got spark. What points exactly did you jumper?