No spark from new coil to cylinder

Tiny
OCKSTER
  • MEMBER
  • 1992 SATURN SL1
  • 186,000 MILES
Engine runs with misfire due to no coil spark. Replaced coil and module without a change in coil spark. Since Saturn uses a "wasted spark" ignition, I removed the spark plug wire coil end boot from #1 & #4 spark plug wires and zip-tied the connectors together and connected both wires to the same nice fat spark producing coil tower, since the coil fires on both compression and exhaust cycles. Still have a misfire, although now I have the necessary spark, albeit from the opposing cylinder's coil connected to the faulty one. I hope I've given you a clear description of my problem.
Thursday, February 9th, 2012 AT 1:29 PM

3 Replies

Tiny
OCKSTER
  • MEMBER
  • 2 POSTS
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Thursday, February 9th, 2012 AT 1:33 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
This is not going to work firstly because how you tie the plug wires together, they would tend to skip, especially under load.

Secondly, each coil is designed to fire one plug, you are making it do double, that means the sparks is ot as strong as it should be.

Did you test the spark plug wires?
Is the replacement part new or used, OEM or after market?

Which cylinder is not sparking initially?
Did you try using the supposedly faulty coil on cylinder 2-3?
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Thursday, February 9th, 2012 AT 1:41 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Just to add to this one I agree with khlow2008 you cant just splice the other spark plug wires into each other. So coil 1-4 sparks a nice blue spark?Coil 2-3 has no spark?How did you check for spark?I always remove the two spark plug wires from the coil I want to check only and crank the engine and see if a nice blue spark jumps from between the two coil towers. Do you have a codes in the computer?
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Thursday, February 9th, 2012 AT 4:56 PM

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