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HelicopterGasser Model RC HelicoptersOther › Ignition Coil Blues !!
04-03-2005 07:37 PM  13 years agoPost 1
gyan

rrKey Veteran

Surrey, BC Canada or Blaine Wa.

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I' ve just replaced my 2nd ignition coil (the one feeding the spark plug) & almost caused crashes every time ! The symptoms are always the same, once the coil warms up, serious glitches & PCM lockouts that last about 1 second & repeat intermittently every 10 or 15 seconds. REALLY scary!! Has anyone else had problems with these things?? The last coil was on my new G26 Hanson engine with only about 1 gallon thru it. I had a minor crash with it (tail servo failure) but not even the boom got bent on my Intrepid. Hardly hit the ground hard enough to do any serious damage on anything else either. Are these things super sensitive or am I just having bad luck here ??

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04-03-2005 09:56 PM  13 years agoPost 2
AGRAV8

rrProfessor

Mosquito Coast......Houston Texas

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HMMMMMMMM
GOT ME SCRATCHING MY HEAD ON THAT ONE.

Your certain it is the coil, and you are NOT running PPM or an antenna past the coil onto a boom support, right??

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04-03-2005 10:12 PM  13 years agoPost 3
gyan

rrKey Veteran

Surrey, BC Canada or Blaine Wa.

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I'm running PCM at the moment & had like 4 or 5 lockouts & came back right away. I replaced the coil from another engine I had & the problem went away ! I'd say guilty as charged wouldn't you?

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04-03-2005 10:27 PM  13 years agoPost 4
AGRAV8

rrProfessor

Mosquito Coast......Houston Texas

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yep
I would. Jail that offender, and go burn some Camper fuel !!

Heck, they all have flashlights and matches already, right??

GOOD guy list-39, BAD guy list-0

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04-04-2005 11:46 PM  13 years agoPost 5
gyan

rrKey Veteran

Surrey, BC Canada or Blaine Wa.

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Does no one else have coil issues ????
I can't be the only one on here that has coil failures, can I ???? No other stories from ignition coils ?

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04-05-2005 02:33 AM  13 years agoPost 6
sgt1959

rrApprentice

Easley SC

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gyan
check to make sure you ignition wire isnt grounding also get a rf cover on your spark plug wire you may be jumping spark also check your ground from coil to ground if its not making a good ground will cause resistance causing coil to over heat you may want to move your ground to a better location hope this helps

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04-05-2005 06:36 AM  13 years agoPost 7
GasIsGood

rrNovice

Port Orchard, WA - USA

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rf cover?
Sgt,

Thanks for mentioning the rf cover in this thread. I haven't heard of or seen one, can you provide a source where I can get one?

Ian

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04-05-2005 07:03 AM  13 years agoPost 8
MitchD

rrApprentice

Antioch TN USA

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Glitch Fix
FWIW:

A good shielded spark plug lead will help reduce rf noise that can wreak havoc w the rx.Good NGK units are usually available at watercraft dealers.

Dont know what type of plugs you're running but the NGK resistor plugs always seem to emit less rf,and or cause less problems.

Keeping your antenna routed away from the plug is also optimal.


Make sure the coil has a good ground that connects to the engine case itself.
You may also want to solid ground your receiver by fabricating a ground cable that will run from any extra channel on your rx,to a bolt that goes into the engine case.
easiest way is to use a servo lead,snip the orange and red or red and white lead off,and solder a 18 guage lead to the ground wire on the servo lead,at the opposite end of this lead,solder a ring terminal to it that will fit around the fastener that goes into the engine case.
Hope this helps
md

'the answers to all problems lie at the bottom of a 55 gal fuel drum

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04-05-2005 11:08 AM  13 years agoPost 9
gyan

rrKey Veteran

Surrey, BC Canada or Blaine Wa.

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Sorry guys if I've been misleading here... I replaced the coil, & the lockouts / glitches went away. I was just wondering if others have experienced bad coils and if it was a frequent issue. Good tips provided here though, thanks. I may do those as well, but I have no glitches at the moment.

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04-06-2005 01:41 AM  13 years agoPost 10
sgt1959

rrApprentice

Easley SC

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gasisgood
you can get the rf shield at minature air tje web site is

http://www.miniatureaircraftusa.com

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04-06-2005 05:45 AM  13 years agoPost 11
rtrickyjr

rrVeteran

Drumore, PA (SW of Quarryville)

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Website
I don't find anything RC wise on that website, which one were you referring to?


-Rick-

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04-06-2005 10:59 AM  13 years agoPost 12
wolfdad

rrKey Veteran

Southern Maryland

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gyan,
gigi had a thread going about two months ago on coil failure and his frustration with the problem. I believe his thread was in the Bergen forum, if I am not mistaken. I can't remember what ultimately solved his problem. Found it! http://www.runryder.com/helicopter/...?highlight=gigi

Based on what you are saying, it almost sounds like the old "Ford" coil problem in reverse. The coils would develope "hairline" cracks allowing moisture to seep in when cold, causing them to short out and kill the coil, normally about the time you needed it the most...in the morning when you were getting ready to go to work. Then, as the day wore on and it got warmer, the moisture would evaporate and the vehicle could be started with no problem, only to repeat the adventure the following morning. Used to drive folks up the wall.

wolfdad sends...

"There are those who have...and, those who will" IRCHA #2117, AMA #70068, Turbine Waiver #105

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04-06-2005 11:00 AM  13 years agoPost 13
gyan

rrKey Veteran

Surrey, BC Canada or Blaine Wa.

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Rick;
He missed the i in Miniature...

Wolfdad: I'm talking about 2 different coils here! & really what I need to know is: Are these coils sensitive to crashes?

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