worked yesterday and replaced with a new replacement Bosch SU12, what the hell.

could be the contact set, could need replacing. they are worth $25

_________________
Bluey-1973 Clubby - 1330, high lift, big cam, 7 port madness in progress..

Gumby-1978 Minivan, British Racing Green - 1310, high lift, mild cam, enlarged porting and chamber shape with big valve head, supercharged build in ever slow progress!

it's possible to get a new one that is dead...

if the old one was working, put it back on, if it wasn't working, then find one that you KNOW does work

put everything back exactly how it was, make sure the car starts, then return the faulty coil - unless you find the problem elsewhere with a loose fitting/missing step/etc. which is often the case

_________________
did I tell you that I won a trophy?

it worked yesterday but while it was jumping across the negative i would push the lead down and loose power and i would also get a small charge at the back of the carby while trying to tune it. ???

what would be the standard resistance you would expect from a 12v??

I had something like that with my Rover, turned out it was a short on one of the wires running off the coil that had rubbed all the sheathing off. Took me a while to find. Stoopid Lucas.

_________________
1970 Mini Deluxe - 1275, Weber, Clive 346 cam, MS 4-pot slotted discs, Megajolt ignition Now with new improved Mambas... almost on the road
1966 Van with Traveller rear seat conversion
2008 Prado GXL
All in various states of repair...

a 12V coil is about 3 ohm. eg Bosch SU12 or GT40.
a coil that uses a ballast resistor (or the pink resistor wire on UK Minis) is about 1.5 ohm. eg Bosch GT40-R.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

GRRRRRRRR!!!!!!!!!

what's that got to do with 'Stoopid Lucas' ????

stupid owner, stupid previous owner - stupid whoever neglected to put the wire in it's proper place to stop it from rubbing on something - Lucas didn't fail to maintain the car

I hate it when people bash Lucas electrics - I wish I could build an electrical system that survives 40+ years of neglect, shoddy modifications and ham fisted owners

sorry - raw nerve

_________________
did I tell you that I won a trophy?

how can you check the cables using a autometer