Sooty plugs all of a sudden….? Summer holiday departure imminent..

[spanishfly]

You know those people you only hear from when they need something…? That appears to be me   .

2.1dj syncro rebuilt by me a few years ago with lots of help from you all and plenty of dramas along the way.
Been running like a dream for 2 or 3 years then suddenly on a trip up country stuttered a few times then started stalling. i made it back to Cornwall with lots of restarts,
changed :
  dizzy cap (bit crusty but not awful)
  rotor arm seemed fine
Stuttering/stalling intermittently gradually getting worse over a few hundred miles.
Tested plug wires (I’d previously put masking tape labels on) all resistances the same and in spec
King lead intermittent OL reading so changed for a spare
All plugs really sooty, swapped for 2 yr old spares
Ran beautifully, smooth and powerful for 100 miles yesterday
This morning chuffy and stalling again, I haven’t checked but for sure sooted up again

So obviously spark related and with holiday departure a few days away there won’t be time or money to source and replace coil/hall sender/ignition amplifier/etc and I really don’t want to retire good original parts and replace with possibly inferior shiny new ones so hoping someone out there maybe able to hazard a guess at which components to try first????

I’m leaning towards ignition amplifier that may just be because it seems the most economical and least invasive?? 


Thanks

 

[Mocki]

Sooty plugs, mixture too rich , have you checked the temp 2 sender is connected , not corroded connection ect
Temp2 controls the equivalent of the choke adjusting the mixture according to engine temp .
What state is the air filter in ? Blocked , oily ? Not enough air intake equals too rich

[spanishfly]

It’s been so utterly reliable I hadn’t even thought about either of those, thanks. I did take off the block earth and clean up that flower arrangement which was pretty green and out of the corner of my eye clocked that the sender over the clutch master was looking a bit dodgy. Maybe one of those 2 wires has an intermittent connection? I’ll check in the morning and look at the air filter. Love this forum!