Dead coil after 8 miles
Thread Starter
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Dirt don't hurt
Joined: Jan 2011
Posts: 21,066
Likes: 4,568
From: Haslet Texas
Dead coil after 8 miles
I just had a weak/no spark problem on my '94 FXSTC.
I installed a new Harley OEM coil.
It made it 8 miles before it died.
The bike was having problems with cutting out but I just thought that was the new carb not set up right yet (I need to fine tune it).
Here's the question:
What could eat a coil in 8 miles?????
I installed a new Harley OEM coil.
It made it 8 miles before it died.
The bike was having problems with cutting out but I just thought that was the new carb not set up right yet (I need to fine tune it).
Here's the question:
What could eat a coil in 8 miles?????
Club Member
Joined: Aug 2008
Posts: 22,870
Likes: 17,966
From: Lafayette, Louisiana
Not likely. Heat and age is what usually leads to coil failure. A dead short or something would have been apparent from the get go. It is possible to get a defect that had poor insulation though.
Pull the coil from your other bike and hook it up temporarily to see what happens.
I am kind of leaning towards a bad pick up being the problem. Either that or the ignition module. Heat and age is the enemy of ignition modules.
Maybe loose connections?
Is there a tachometer on the bike? If so, disconnect it to see if it makes a difference.
Pull the coil from your other bike and hook it up temporarily to see what happens.
I am kind of leaning towards a bad pick up being the problem. Either that or the ignition module. Heat and age is the enemy of ignition modules.
Maybe loose connections?
Is there a tachometer on the bike? If so, disconnect it to see if it makes a difference.
Seasoned HDF Member
Joined: Dec 2006
Posts: 8,243
Likes: 6,182
From: Black Hills
I used to have a car that did that, when it got hot the coil would short out. When it would cool down I could drive it again. Couldn't test it unless it was hot and failing.
Good luck sometimes that stuff can be miserable to diagnose.
Good luck sometimes that stuff can be miserable to diagnose.
Thread Starter
|
Dirt don't hurt
Joined: Jan 2011
Posts: 21,066
Likes: 4,568
From: Haslet Texas
Not likely. Heat and age is what usually leads to coil failure. A dead short or something would have been apparent from the get go. It is possible to get a defect that had poor insulation though.
Pull the coil from your other bike and hook it up temporarily to see what happens.
I put on a spare coil I had and the bike fired right up.
I am kind of leaning towards a bad pick up being the problem. Either that or the ignition module. Heat and age is the enemy of ignition modules.
Both of those are a bit over 1 year old.
Maybe loose connections?
Damned if I can find any.
Is there a tachometer on the bike? If so, disconnect it to see if it makes a difference.
No tach.
Pull the coil from your other bike and hook it up temporarily to see what happens.
I put on a spare coil I had and the bike fired right up.
I am kind of leaning towards a bad pick up being the problem. Either that or the ignition module. Heat and age is the enemy of ignition modules.
Both of those are a bit over 1 year old.
Maybe loose connections?
Damned if I can find any.
Is there a tachometer on the bike? If so, disconnect it to see if it makes a difference.
No tach.
Thread Starter
|
Dirt don't hurt
Joined: Jan 2011
Posts: 21,066
Likes: 4,568
From: Haslet Texas
What did it turn out to be on your car??
Elite HDF Member
Joined: Oct 2005
Posts: 3,872
Likes: 83
From: Canton, Michigan
Ignition module went **** up on my Ford 5.0L in my Jeep CJ. Took a couple of days to diagnose it, and an hour or so to replace it (have to tear the distributor apart). Fired right up afterwards.
Anyways... I'm watching to see what actually is the fault.
Anyways... I'm watching to see what actually is the fault.
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Seasoned HDF Member
Joined: Dec 2006
Posts: 8,243
Likes: 6,182
From: Black Hills
It was the coil, I got to the point where I carried water to pour over it to cool it down. New coil worked for me.
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