95 Thunderbird ignition coils

saftie

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The bike is having a really hard time starting. Even starter fluid doesn't do anything.

I Ihink I need to replace the coils.
Testing spark (with light as well as plug against engine) it is very inconsistent.
Measuring resistance only shows .2, I think it needs to be higher.

All coils measure pretty the same. One is at 0.1

now the question is: did I measure incorrectly, is it really all three coils or could it be the CDI?
 

saftie

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I just put in an order for replacement coils. Should be here by end of the week.
I'll let you know if this resolved my issue.
 

Rocky

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I'm lousy with electrical issues so am of no help to you.
I hope the coils do the trick TUP
 

saftie

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In all the builds I have done, I have never come across faulty coils. But I read a lot about failing coils for these bikes. So yes, hopefully this does the trick.

I finally have a shop manual on the way to me. It's awful not having one and trying to figure things out.
 

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I agree about a shop manual. Vital info to have. Without one it's almost like working in the dark BGRIN
 

CarlS

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I agree about a shop manual. Vital info to have. Without one it's almost like working in the dark BGRIN
I agree with that. I had an intermittent stalling problem on an 03 T100. New coils cured the problem.
 

Wire-Wheels

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I have had coil issues with BOTH my 3 cylinder Triumphs. Seems like.the older ones had more of a problem with this. The "Gill" branded coils were notoriously bad. ...J.D.
 

saftie

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Thanks.
I am really hoping it's the coils, but all points to it. Plan is to throw the new ones in and go for a ride :)
 

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Let us know if new coils solve the problem.
 

saftie

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Will do for sure.
Get them Thursday, will put them on the bike Friday morning.

Do you know what the fuel line diameter is by any chance? Want to order a fuel filter. The 1/4 I had around was too small.
 

CarlS

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I do not know the diameter and my manual is in storage.
 

saftie

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Ok. I'll check in morning. Was on my way home from work and wanted to use time to order.
 

saftie

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saftie

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Looks like FedEx is faster than expected and delivers coils today. Yay.
I'll report back tomorrow morning
 

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Hope that solves the problem, but could be something else. I guess we will see…J.D.
 

saftie

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let's hope it is not something else :)
but you might be right.
going through the parts diagram on bikebandit, it appears as if there is an evap box on the bike.
of course there is no sign of any tubes leaving the rear box....
fun times
 

CarlS

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Eagerly waiting to see if the new coils solve the problem.
 

saftie

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Had a few mins and just threw them on.
Can't say there has been much improvement. Bike started after some cranking. It did start right up on second and third attempt.
I'll let it cool down and try again in an hour or so and see how that goes.
Bike did react to starter fluid this time though. Better than before where it didn't seem to do anything.

I noticed cylinder three exhaust manifold was cold. Unplugged spark plug boot and tried again. This time it got hot. I did see some heat damage to rubber on spark plug wire. Could be affecting it, but the other two should still fire easily.

If bike still has issues, I will go over wiring thoroughly as next step.

Another concern is the battery acid spill on right side. Someone topped off the battery and acid made its way out.
Also, connectors in general are dirty.

Was hoping I could do one or two things to get bike running ok, but looks like I need to go back to my usual habit of taking stuff apart, cleaning and inspecting everything and out it back together.
 
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saftie

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Just tried again and bike started right up. At least something.
If it fires in morning without much drama I'm happy with progress
 
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