Lane A cylinder 3/4 Ignition Fault

Jeff Blakeslee wrote:

Mike,

You might to read through this post.  It concerns a similar problem that ended up being solved by cleaning the wiring terminals at coil SP-4.  Not the plug wire terminals, but rather the wiring harness terminals. 

https://www.rotax-owner.com/en/915is-technical-questions/10361-lane-b-engine-ecu-nominal-current-not-reached?start=0

Thank you for the lead, I will look into cleaning those. 

Robert Gaynor wrote:

I think plugging in a buds cable would show if this is the problem also. Sorry I am a fan of using a buds cable. 

Im trying to find someone who has one.  Thanks for the replies.  

So I believe I have fixed this issue with new plugs.   
Since it was a Lane A (coil 1,3) caution indicating cylinder 3/4 ignition fault (coil 3), I replaced plugs 3B and 4B which feed from coil 3.   In 2+ hours of flying and numerous approaches under conditions that would repeatedly show this fault I haven’t seen it since.   

Thanks for all the advice.  

hey Mike...thanks for the feedback.  Often people do not comment with it starts to work again.  Glad it is working for you now.

Cheers

I agree on checking/cleaning the cables and connectors. Just found a similar problem on my 915iS.  On my takeoff roll Lane B light would come on and stay one.  Sometimes, I could toggle it off, and sometimes not.  I have dual G3X displays and all the engine data was in the green, but I was getting an "ECU" error.

Very perplexing.  It turned out to be a bad spark plug wire on cylinder 2. Had to find a shop with a BUDS Dongle and it pointed to an ignition error. I know BUDS Dongles cost an arm and a leg, but I think I will invest in one.