Diagnostics: Ohm reading for TCI pick up coils

[fj1289]

It's day 5 -- half way done yet?!!   

[Pat Conlon]

I had company all weekend...no chance to work on the mistress... A busy time here in the desert with house guests.

Worked yesterday and this morning....nothing to report. I'm thinking it could be a signal problem between the TCI and coils via the oem harness.
My final test will be bypassing the oem harness and running signal new wires....after that, I'm out of ideas.

My buddy Paul Lawson and his son Jason will be coming Thursday to pick up Jason's '93 (exABS) bike I've been working on (a lot of work)
...as well as Paul's 'new' '92 (my '92 I sold to Paul) I'm gonna shelve further work on my '84 until things calm down here at home, perhaps next week.

My '84 currently runs very good, very strong, other than that brief little studder....

If or when I ever figure out the cause, I'll report back.

[Pat Conlon]

Hey pat I just remembered something that happened to me similar to your problem.

The run/kill switch was acting up on my 86 and would cause a miss at the rpm you are talking about.
problem only in the fun rpm zone in third gear.
Check that out.
I took it apart and cleaned it and used the dielectric grease on the contacts.

Good luck.

Ok I found it....Mark ^^^ gets a free breakfast at the WCR.

I've had a house full of company for the last 3 weeks and yesterday everyone left....a quiet morning with a cup of coffee is wonderful...looking at the wiring diagram for my '84 I see that the ignition box (TCI) is powered by its own circuit (red wire/white stripe) and that circuit runs from the fuse block through the run/stop switch on the handlebar and then down to the TCI.

Previously I did disassemble the run/stop switch and cleaned the contacts, checked the little pressure spring that holds the contacts together...but the problem remained.

What I did to rule out a electrical supply problem to the TCI was to run a temporary jumper wire from the fuse block directly to the TCI.....I went for a ride, warmed her up, then visited the kookaloo zone....the studder is gone.

So that means that there is a problem in the circuit that runs through the run/stop switch. Careful checking with my multimeter showed which side of the switch (fuse to switch and switch to TCI) the problem was on.
The problem was in the wire between the switch and the TCI, after the connector block.

I *guess* what was happening was that the studder was somehow vibration related....at a certain rpm 7.2k the vibration caused the broken strands in the wire to lose conduction...I ruled out a voltage/amperage issue because the bike would run well in the 7.3k to 10k rpm zones.

Thanks Mark see you at the WCR!  Also a shout out to FJ Monkey Mark for taking the time in doing a continuity check for me....it was very much appreciated! When Mark reported that the run/stop switch opened the circuit in the stop mode and thus de powered the TCI, I knew where to check, and what to do..

Even with a house full of hyped up grand kids, I've been thinking about this for weeks...my subconscious does not like unresolved problems. My reticular activating system helped clarify things even in the mist of chaos.

We now return you to your regular program.....

[Mark Olson]

Allright  yeah I like breakfast .

Good job on the follow thru to find the problem source pat.  You must be a happy camper now.

[Pat Conlon]

Thanks again Mark...is it rally time yet?

[Mark Olson]

Thanks again Mark...is it rally time yet?

No not yet ...still got some things to do.

[JOMPPA10]

A thought here, 

Install a known good set of OEM coils and make no other changes, take it for another romp through the canyons.

+1 usually these aftermarket sets dont work
seen that tested that by seeking my bikes running problems



Fred