The Autonerdz Community Forums - 1996 Honda Shadow 1100 with possible ignition prob

StitchB Super Nerd Picogroup Offline Posts: 1,314 lake stevens Washington USA Gender:	Re: 1996 Honda Shadow 1100 with possible ignition prob Reply #30 - Oct 28^th, 2017 at 7:39am Auto Sparky, Just viewed your location, see NZ, welcome. Larry
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RedlinePowersports

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Re: 1996 Honda Shadow 1100 with possible ignition prob
Reply #31 - Nov 2^nd, 2017 at 10:29am

Okay guys, Sorry it took me a while to get back on this. Been a little crazy around here. I took a new capture that I think I may have found something. Not sure though.

Check out the capture and let me know what you think. The capture is done fully on the front cylinder. Two secondaries because each cylinder has two spark plugs. The red and blue leads are secondary ignition. They should be firing at the same time due to firing off the same coil. The green lead is primary voltage and the yellow lead is primary current as you guys requested.

If you zoom in on the primary current (yellow lead) halfway up the arc you will see a bumble in the current draw. I think this may be part or all of the problem. Not 100% on what it means but I would have to believe that the amperage draw should be a smooth arc and not have a varying line in it. This, to me, could be why the secondary KV numbers and burn time are low.

What do you all think? I am happy to send any more info you guys want!

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Honda_VT1100C2_Shadow_1996_All_front_cylinder_waveforms.psdata (2261 KB | )

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RedlinePowersports Freshman Member Picogroup Offline I'm a motorcycle Autonerd Posts: 47 Waukesha Wisconsin USA Gender:	Re: 1996 Honda Shadow 1100 with possible ignition prob Reply #32 - Nov 2^nd, 2017 at 10:35am Here is the current draw issue that I was referring to in the previous post.
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RedlinePowersports Freshman Member Picogroup Offline I'm a motorcycle Autonerd Posts: 47 Waukesha Wisconsin USA Gender:	Re: 1996 Honda Shadow 1100 with possible ignition prob Reply #33 - Nov 2^nd, 2017 at 10:38am Another view but zoomed in on one waveform. Seems like a pretty big dip in amperage.
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James H Senior Member Picogroup Offline Bike Nerd Posts: 165 Waterloo Ontario Canada Gender:	Re: 1996 Honda Shadow 1100 with possible ignition prob Reply #34 - Nov 2^nd, 2017 at 11:08am Yeah, doesn't look right to me from my limited experience. The coil turn off doesn't either but I have seen where they do not completely fall to ground straight down, just not that bad. Can you do the other coil to see if its the same?
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RedlinePowersports Freshman Member Picogroup Offline I'm a motorcycle Autonerd Posts: 47 Waukesha Wisconsin USA Gender:	Re: 1996 Honda Shadow 1100 with possible ignition prob Reply #35 - Nov 2^nd, 2017 at 11:29am Sure, will do. Stand by.
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RedlinePowersports Freshman Member Picogroup Offline I'm a motorcycle Autonerd Posts: 47 Waukesha Wisconsin USA Gender:	Re: 1996 Honda Shadow 1100 with possible ignition prob Reply #36 - Nov 2^nd, 2017 at 11:44am Rear cylinder current draw. Definitely different!
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RedlinePowersports Freshman Member Picogroup Offline I'm a motorcycle Autonerd Posts: 47 Waukesha Wisconsin USA Gender:	Re: 1996 Honda Shadow 1100 with possible ignition prob Reply #37 - Nov 2^nd, 2017 at 11:46am Zoomed out a bit on the rear cyl to capture a few waveforms in a row.
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RedlinePowersports

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Re: 1996 Honda Shadow 1100 with possible ignition prob
Reply #38 - Nov 2^nd, 2017 at 11:49am

Here is the full file if you guys want to compare to the front cylinder.

Let me know if there are any other tests you think I should run.

I definitely see a difference here between the current from front to rear cylinders.

Could this be a bad TCI not switching on and off properly? The pulse or trigger coil waveforms looked good to me going into the TCI.

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Honda_VT1100C2_Shadow_1996_All_rear_cylinder_waveforms.psdata (2322 KB | )

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Spence LSD Guide Picogroup Offline Posts: 8,025 Jeffersonville Pennsylvania USA Gender:	Re: 1996 Honda Shadow 1100 with possible ignition prob Reply #39 - Nov 2^nd, 2017 at 12:18pm Does TCI stand for something that is controlling the ignition coil primary?
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RedlinePowersports Freshman Member Picogroup Offline I'm a motorcycle Autonerd Posts: 47 Waukesha Wisconsin USA Gender:	Re: 1996 Honda Shadow 1100 with possible ignition prob Reply #40 - Nov 2^nd, 2017 at 12:55pm Transistor Controlled Ignition
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Spence LSD Guide Picogroup Offline Posts: 8,025 Jeffersonville Pennsylvania USA Gender:	Re: 1996 Honda Shadow 1100 with possible ignition prob Reply #41 - Nov 2^nd, 2017 at 3:24pm RedlinePowersports wrote on Nov 2^nd, 2017 at 12:55pm: Transistor Controlled Ignition That's what I thought but hate to assume.
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RedlinePowersports

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Re: 1996 Honda Shadow 1100 with possible ignition prob
Reply #42 - Nov 2^nd, 2017 at 5:25pm

So I spent some time today and I (believe it or not) had a matching coil laying around the shop that is the same as the ones that are in the bike. But only one :/

So I swapped out the front coil with this one from the shop, I also discovered that I had the current clamp on the wire backwards. I totally spaced and forgot that it has an orientation.

Attached is the new waveforms and the current looks much different! Still not making any more horsepower tho :/

After this post I will post the rear cylinder for comparison. The rear cylinder amperage draw looks slightly different. The rear cylinder is the coil I did NOT change. Just want everyone to know which one was changed and which was not.

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Honda_VT1100C2_Shadow_1996_Front_Cyl_Replaced_coil.psdata (2264 KB | )

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RedlinePowersports Freshman Member Picogroup Offline I'm a motorcycle Autonerd Posts: 47 Waukesha Wisconsin USA Gender:	Re: 1996 Honda Shadow 1100 with possible ignition prob Reply #43 - Nov 2^nd, 2017 at 5:30pm Attached is the rear cylinder data. Like I said the current seems different at the tail end of each pulse or turn on. Please let me know if this helps! I'm running out of ideas!
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StitchB

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Re: 1996 Honda Shadow 1100 with possible ignition prob
Reply #44 - Nov 3^rd, 2017 at 6:12am

Redline, Burn times with these look more normal, and noticed RPM seems to be around 1800,, is that a normal RPM for a twin?, Idon't know, sounds high, usually indicative of a lean burn. Have we ran this unit with exhaust off, ect.

Noted fire time about 1.3 MS, and the other is IMO, waste fire as only about half that as there is nothing in that hole.

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