No spark- i think figured out

[kendelrio]

All-
Yesterday driving along at 55 yesterday, she backfired twice and died.

I have checked fuel system, all good.

Today i dug into the ignition system, heres what I've done:

Checked power to the distributor, healthy 24v. Checked resistance of the coil- 5.6 ohms. No spark at the plugs.

New Pertronix ignition module, original coil.

My first thought is coil due to lack of spark, but it's possible the module failed.

Is there any way to confidently check the output of the module other than looking for fire at the plug spark?

**edit**

Checked primary resistance: 5.6, that's out of the 3-4.5 specs in the TM

Checked secondary- 14.4, that's out of the 9.5-10 ohm specs.

Ordered a new coil from MECO.

 

[m715mike]

No pictures? Who are you and what have you done to @kendelrio ???

 

[kendelrio]

No pictures? Who are you and what have you done to @kendelrio ???

My bad!
Said distributor:



The boy learning about distributors:

 

[kendelrio]

Also, @G744 gave me a GREAT test procedure for the module to determine whether its coil or module. I'm setting up the parts I need and may post a thread on it.

 

[eaw46]

I put a Petronox system in my 725 it helped with some issues I was having. It would not make any difference in this issue but solved several others.

 

[kendelrio]

I put a Petronox system in my 725 it helped with some issues I was having. It would not make any difference in this issue but solved several others.

Yup. The Petronix is amazing.