GVR-4 No spark cylinder #3 only

[4gfun]

So it looks like folks who get it easy get no spark on cylinders number 2&3 which makes it easy to diagnose.

I am never the lucky guy. In my case, it is just #3. I verified it with my timing light...no flash on #3.

I tried another coil and wire as well. Any ideas what is going on here?

Thanks

 

[luv2rallye]

Most likely spark plug or spark plug wire.

 

[pauleyman]

Could still be a coil if there is a problem with that tower

 

[luv2rallye]

^ good point. Run the engine in the dark and look for any sparks jumping from coil or wires.

 

[pauleyman]

If you want a quick and dirty diagnosis swap the coils and see if the problem follows that one tower. I would swap cylinders too just cause you can. If the problem is always on that one tower you found the issue.

 

[4gfun]

Thank you, kinda fixed itself.

 

[luv2rallye]

It will be back. You may want to wipe off spark plug cables and coil towers as moisture in dirt provides a path to ground.

 

[4gfun]

Well I said kinda because the moment I removed the wire from the plug itself about 2 inches back from the plug it began to fire normally. Strange that you couldn't hear the spark though, but the timing light showed a flash once removed.

Then I cleaned up the plug threads with carb cleaner and the thread holes with carb cleaner and it has kept firing. Kind of weird.

 

[pauleyman]

Even with the parts replacement I wouldn't rule the problem fixed just yet. You didn't mention how the plug itself looked.