IGNITION PROBLEM: Arcing Sparkplug

[Phoenix7]

Well I asked on the other club a while back and didn't get much help and the problem was never fixed.

Backstory: Visible current on the outside of the sparkplug on my friend's vert. He replaced wires, plugs, and the problem is down to the L2 sparkplug. The Leading plug of the second rotor was ARCING badly. Now it's stumbling too.

Well he has been working on it all day and decided to use the LED ECU CODE CHECKER to see if it was throwing any codes.

None.

We checked his timing and it was way off so it was brought back to specs. It was still stumbling and we weren't expecting the arcing to stop which we believe might be causing the stumbling.

Next he decided to test the coils. We checked the FSM and it tells you to do a voltage test to make sure the coils were getting plenty of power. Did Steps 1-3 and read the warning about causing damage if you do not unplug the battery before removing the voltmeter probes.

It tested at 14.4V.

FSM SPECS: 12V

OK, so the coils are getting pumped with 14V and causing the arcing?

Maybe a ground?

Well I found a nice article on team FC3S.org about the ignition system A GREAT READ!

Well, it got me thinking that we might as well eliminate the CAS as a possible cause of the ignition issues. Well the FSM says that the G1 and G2 signal should be between 110Ω–210Ω and the same for the NE1 and NE2. Well the CAS is coming at 168 and 168.5 respectively.

It's fine electrically. tomorrow we're going to pull it out and make sure it's set properly and recheck the timing and keep tracking down the problem.

Any thoughts or input would be greatly appreciated.

KEYWORDS: FSM, FSM*, LED, CODE, CHECKER, ARC, ARCING, SPARK, PLUG, LEADING, COIL, CAS, CAS*, STUMBLING, MISSING, TIMING

[Phoenix7]

Well I asked on the other club a while back and didn't get much help and the problem was never fixed.

Backstory: Visible current on the outside of the sparkplug on my friend's vert. He replaced wires, plugs, and the problem is down to the L2 sparkplug. The Leading plug of the second rotor was ARCING badly. Now it's stumbling too.

Well he has been working on it all day and decided to use the LED ECU CODE CHECKER to see if it was throwing any codes.

None.

We checked his timing and it was way off so it was brought back to specs. It was still stumbling and we weren't expecting the arcing to stop which we believe might be causing the stumbling.

Next he decided to test the coils. We checked the FSM and it tells you to do a voltage test to make sure the coils were getting plenty of power. Did Steps 1-3 and read the warning about causing damage if you do not unplug the battery before removing the voltmeter probes.

It tested at 14.4V.

FSM SPECS: 12V

OK, so the coils are getting pumped with 14V and causing the arcing?

Maybe a ground?

Well I found a nice article on team FC3S.org about the ignition system A GREAT READ!

Well, it got me thinking that we might as well eliminate the CAS as a possible cause of the ignition issues. Well the FSM says that the G1 and G2 signal should be between 110Ω–210Ω and the same for the NE1 and NE2. Well the CAS is coming at 168 and 168.5 respectively.

It's fine electrically. tomorrow we're going to pull it out and make sure it's set properly and recheck the timing and keep tracking down the problem.

Any thoughts or input would be greatly appreciated.

KEYWORDS: FSM, FSM*, LED, CODE, CHECKER, ARC, ARCING, SPARK, PLUG, LEADING, COIL, CAS, CAS*, STUMBLING, MISSING, TIMING