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jordynsdaddy
jordynsdaddy, Technician
Category: Car
Satisfied Customers: 33
Experience:  Safety & Emission Inspection license.17 years experience,shop owner
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1975 ford 302ci No Spark already replaced control mod. and coil

Customer Question

1975 ford 302ci No Spark already replaced control mod. and coil
Submitted: 7 years ago.
Category: Car
Expert:  jordynsdaddy replied 7 years ago.
Chat Conversation Started
jordynsdaddy :

have you checked for spark directly from the coil, instead of from one of the plug wires?

Customer:

yes no spark

Customer:

how is that done?

jordynsdaddy :

Use a test light and check the red/light green wire on the coil. let me know if you got voltage there.

Customer:

ok be right back

jordynsdaddy :

make sure you are cranking it when you check for voltage.

Customer:

yes have power on one side of coil while cranking only

jordynsdaddy :

did you replace the coil with a new one, or a used one?

Customer:

new one

jordynsdaddy :

Also, which wire did you check for voltage?

Customer:

red one

jordynsdaddy :

ok, good. Do you have an ohm meter? If so i want you to do the following.


  • Disconnect ignition coil electrical connector.

  • Using a suitable ohmmeter, measure resistance between coil Batt. terminal and Tach terminal.

  • If reading obtained is 0.8---1.6 ohms
  • Customer:

    no i dont but can get one monday do you think the coil i got is bad?

    jordynsdaddy :

    Well you've got voltage from the ignition coming in to the coil, so we can iliminate the ignition itself or a fuse. But we don't have any voltage coming out of the coil. Pretty much what a coil does is takes that 12 volts from the ignition and runs it through windings, magnifying it, and sending it to the distributor. We have the voltage coming in, but none coming out. Plus you said you replaced the ignition module. Yes i'm looking for a bad coil.

    Customer:

    when checking the coil I foung voltage at bolth the pos side and neg side is this correct

    Customer:

    earlier I ask about my1975 ford 302ci with no spark I never got a good answer and have more questions