No spark on only 2 dizzy cap points?

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dweinhart

Member
Messages
112
Location
Az
I am confused. New coils,new caps, new wires but I have intermittant spark loss on just 1 side of my distributor cap... How is that possible>
 

dweinhart

Member
Messages
112
Location
Az
What can cause a spark loss on only 1 side of dizzy? I have swapped caps to other side in case my new caps were bad but the the spark loss stays on same side. Can someone tell me where signal comes from for the spark?
 
Last edited:

ivan129

BlownZX
Messages
206
Location
Some where down under
I'd be chasing the source backwards from the distributor that has not spark, HT lead, coil, wiring to the coil, power and trigger signal at the coil. If no signal, wiring from ECU, cam angle sensor. Not hard to do if you you have one working side to compare with. Just need a volt meter and test lamp. You could start by removing the HT lead from the bad dizzy's coil and fit a spark plug lead to the coil, run the lead to a spark plug earthed against the metal body of the engine, crank and check for spark. Good luck.
 
Last edited:

Zuffen

Super Moderator
Staff member
Messages
5,539
Location
Sydney, Australia
I'd swap trhe igniter plugs over and see if the fault swapped distributor caps.

That will tell you if they are working.

If they are the problem is between them and the coils or after the coils.

If the problem swaps distributors you could have a dead igniter of a wiring issue back to the ECU.
 


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