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1970 Chevrolet El Camino Intermittent spark

Tiny
DBOGNAR3
  • MEMBER
  • 1970 CHEVROLET EL CAMINO
  • 88,000 MILES
The vehicle will only spark once as soon as the key is turned. While cranking it will not spark. As soon as you let the key snap back it will spark. The coil was replaced and the problem still exsists.
Thursday, September 19th, 2013 AT 5:31 PM

7 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Do you have a test light?
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Thursday, September 19th, 2013 AT 5:50 PM
Tiny
DBOGNAR3
  • MEMBER
  • 4 POSTS
Yes, it has power when the ignition is in the on position. Iam cheching the spark at the coil.
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Thursday, September 19th, 2013 AT 5:56 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Hook the alligator clip from the test light to the positive side of the battery. Then touch the negative side of the coil with the tip of the test light. Then crank the engine see if the test light flashes?
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Thursday, September 19th, 2013 AT 6:01 PM
Tiny
DBOGNAR3
  • MEMBER
  • 4 POSTS
I will try that. It has power going in but not steady spark. It will flash only one time.
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Thursday, September 19th, 2013 AT 6:13 PM
Tiny
SATURNTECH9
  • MECHANIC
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The positive side of the coil has power to it?Let me know if the test light flashes while cranking?
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Thursday, September 19th, 2013 AT 6:29 PM
Tiny
DBOGNAR3
  • MEMBER
  • 4 POSTS
Yes the positive side has power when the key is on.
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Thursday, September 19th, 2013 AT 6:36 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Now check the negative side of the coil the way I told you too.
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Thursday, September 19th, 2013 AT 7:00 PM

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