What volts should the coil read during cranking?

Tiny
BSAM450
  • MEMBER
  • 1973 DODGE TRUCK
When I turn the key on the test light on the positive side of the coil lights up. When I crank the engine over the light goes off. It seems to me when I let off the key it will then fire. Can you help me in the right direction.
SPONSORED LINKS
Do you
have the same problem?
Yes
No
Saturday, February 25th, 2012 AT 5:32 PM

3 Replies

Tiny
HMAC300
  • EXPERT
Replace the ballast resistor on the firewall. That sounds like your problem.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Saturday, February 25th, 2012 AT 6:34 PM
Tiny
BSAM450
  • MEMBER
Well I forgot to mention that I did replace the resitor on the wall and also the module box. It wouldn't even fire before that.
Was this
answer
helpful?
Yes
No
Saturday, February 25th, 2012 AT 7:07 PM
Tiny
HMAC300
  • EXPERT
Check gap of pickup coil in dist.008-.010" resistance of pu coil should be 400-800 ohms
Was this
answer
helpful?
Yes
No
Saturday, February 25th, 2012 AT 7:16 PM

Please login or register to post a reply.

Related Ignition Coil Test Content

Ignition Coil System Test Repair - All Cars
VIDEO
Ignition Coil System Test Repair - All Cars
Instructional repair video
Ignition System Testing
GUIDE
Ignition System Testing
Step 1 - Identify the type of ignition system to be tested, most cars, use a coil over plug (COP) type of system, there are several variations but all work on the same...
VIEW MORE

Sponsored links