Hello all I have crank but no spark on my port engine. 

Both sides of the coil are hot put in a new coil and both sides are still hot. 

Any thoughts or suggestions would be much appreciated. 

Thanks in advance,


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Mayday anybody?

Do you have points still? Have you replaced the condenser? Are you checking coil voltage during crank?

Sorry for all the questions.

No problem here’s What I got


11-12 volts while cranking

Can't  paste  the  link  but search  comes  up  with  several  test procedures.  One  says  to check  voltage  with  sensor  blocked.  It should  drop  to 2 volts.

Thank you Big Dog Tim Miller. If you could email the link that would be great!

from what I have read these photo centric modules are very susceptible to voltage fluctuations

Timothy "Tim" Miller said:

Can't  paste  the  link  but search  comes  up  with  several  test procedures.  One  says  to check  voltage  with  sensor  blocked.  It should  drop  to 2 volts.


i would swap modules between distributors first, pretty quick way to do and you then know if there is an electrical issue or simply a bad module

Module from Strb engine which fires and runs like a champ placed in port engine with same results(no fire) Replaced coil on port engine also same result.


Here are some stupid questions.

1. Are you checking for spark at the coil lead to distributor or at a particular plug

2. Is the rotor spinning when you are cranking

3.Is the end of the rotor OK?

4.Is the contact on the rotor top touching the cap?

There is no spark at the coil lead
Brand new coil
Rotor is spinning while cranking
I have not swapped rotor and cap only
I didn’t think the cap and rotor would be suspect seeing that I have nothing coming from the coil lead?
Thanks Wally

Wally, You are correct. I only asked that in case you were checking spark at the plug.

Could? there be a break in the wire from the coil to the distributor module?

Could that plug with the 3 wires have a break?

Where do those 3 wires go?

If you want to call me. go ahead. 330-714-7711


I have reviewed some schematics, while I have not seen which rotor you have. If the rotor is not triggering the module on its way around, the coil will not fire. I think from your photos, the rotor serves some purpose in triggering the coil to fire. Swap the rotors

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