Club 80-90 Forums

maybe worth you having a read here

https://club8090.co.uk/forum/viewtopic.php?f=39&t=135487" onclick="window.open(this.href);return false;

Well the "fun" continues.

Have replaced the hall sender, and in doing so confirmed that the dizzy is all working as it should, no shaft wobble, advances working fine.

Misfire remains.

Coil measures within spec cold and after running for a while (it does get quite warm).

Ignition module is about 12 months old, fitted by PO.

12V live is good and stable. Earth is clean and shiny. Wiring resistance is fine, connecots are all clean and shiny.

So is the nearly new ignition module faulty, or do people still think the coil? Tempted to buy both and see what happens.

Any other ideas?

I'm surprised to see that you have changed the hall sender (bit of a faff to do, expensive, rarely faulty) before the coil (5 minutes, cheap, more common failure).
Could you borrow a coil for a quick test run?

Sent from my ONEPLUS A3003 using Tapatalk

ajsimmo wrote:I'm surprised to see that you have changed the hall sender (bit of a faff to do, expensive, rarely faulty) before the coil (5 minutes, cheap, more common failure).

Basis for this was that coil measures within spec both cold and when its been in use for a while, i.e. it should be fine.

Hall sender is cheaper than coil as well, and cheaper than getting a suitable test meter to test it!

Finally got round to buying and fitting a new coil.

Now revs cleanly, no bounce on the rev counter, all good. Needs a run now to check, but it does seem properly fixed.

Still don't understand why the old one which measures fine cold and hot doesn't work....

Well done for sticking with it, glad that you got it sorted

T25Convert wrote:
Still don't understand why the old one which measures fine cold and hot doesn't work....

becuse your multimeter measures using microamps but in reality your coil takes amps

Multimeters often lie to you.

itchyfeet wrote:

T25Convert wrote:
Still don't understand why the old one which measures fine cold and hot doesn't work....

becuse your multimeter measures using microamps but in reality your coil takes amps

Multimeters often lie to you.

Thanks - never really thought about it before, bu that makes perfect sense. Easy to see how threading big amps through a coil of wire might cause it to expose weaknesses that small amps of themeetr would never uncover.

Everydays a school day!