Intermittent loss of spark

[BRoadGhost]

Anyone ever had this? Everything runs fine then bam no spark; can be totally random and there's no correlation with engine load, temperature or RPM.

[Benn]

Wiring? Pins in plugs ok? Hall affect (if it has one)

[meritlover]

i have had this.

[Stuart]

coil and dizzy or coilpack?

if its the coilpack its likely to be wet., and or change the plugs.

[Southie]

Could also be a main earth, had something similar on my old C16xe conversion. I ended up adding extra earth cables, one at the gearbox end, another extra from the alternator and an extra one to the battery.
Also cleaning the existing earth points.

[scott.parker]

Deteriorated coil pack?

[Benn]

Will be a dizzy and coil set up s it's a carb'ed engine.

[jimbob-mcgrew]

black ignition live wire to the coil might have a break in it

[BRoadGhost]

Yeah a C20XE on 45's with a dizzy running a brand new coil & ignition amplifier; I could run a wire direct from the battery + to the coil / amp and it would still do it.

Had the thing setup on the rollers this afternoon and it cut out once in 2 hrs, rest of the time it never missed a beat making the power it should. Got within 400 meters of home & the thing just cut out & didn't want to start for another 20 minutes.

[Benn]

Should it be coil or amp getting to hot? (on the rollers you'd of had big fans cooling it down, drive home could get hotter)

I melted the insides of a coil when it was hidden...