Hi all,I am on rebuilding a 1043cc polo engine just bought a new coil and leads could someone help with some information on wiring everything so it will run on the engine stand (not going into car) I’m planning on making my own loom if someone can tell me all the wires needed and where they go,thanks for any help
to make it actually run, next to nothing. all you need is a battery, starter, ignition coil & a distributor. Apart from the main battery live to starter+alt and earth to engine block, bare minimum as its points you'll need a switched 12v power feed to the coil fed through a resistance wire (white/purple on a factory loom) or a suitable ballast resistor between the coil and the 12v input. then a wire from the distributor points to the coil negative for your spark trigger, 12v to the alternator D+ to trigger it to start, and 12v to the starter through a switch. thats it, job done. for the carb depending on which one it is you may need a 12v feed for choke/heaters, theres a thermoswitch for the inlet heater and possibly another for autochoke again depending on the model of carb you choose. if using the inlet heater this will need fed thru a relay, switched by the thermoswitch. probably no need for a bench engine though, just the carb you need to worry about so it warms up nicely
Great thanks for the advice I didn’t know where to start with wiring the coil I it’s the fist old school wiring iv looked at thanks again
actually what does the dizzy look like? I assumed it was points but if its a later one might be electronic. does it have a 3 pin plug on the side or just a single wire? if its out of a mk2f polo it'll have an SPI unit rather than a carb also
Hi it’s got points one green wire going into a black box,I was told it was a 1978 mk1 polo but the engine code is GL so it’s looking like it’s a replacement engine from a 81-86? Cheers
perfect then as per my first post then. 12v to coil live via resistance wire or balast resistor whatever is easier, coil negative to dizzy, main live & earth from battery to engine. finally check the carb to see what type it is then we can put more details on feeds required for it
That’s great thank for helping out it has a solex 31 pic t-5 it’s manual choke but does have fuel shut off switch well I think that’s what it is
from memory i think it just has an ignition live to that cut-off switch, will try to find a diagram when i get a minute
That would help me out a lot thanks for your help if you know anyone with a early polo I have some parts for sale as not needed
thats a different thing, it sits at dizzy side of the circuit. you need to reduce the voltage input to your coil on the live terminal as the points coils dont run at full 12v. so theres either a resistance wire from fusebox to coil to do the job or on some theres a balast resistor instead
The coil I have says ballast on it will that still need a resistor and will it need the condenser at the points
Hi I have tried to bench test the coil but I’m not getting any spark and it’s a new coil,I have a switched live going to it and the negative from the battery to a set of points and a ht lead with a plug in but nothing happens when I break the points have I wired it right? Thanks
dont put any negative wires direct to the coil, just ignition live to live side and wire from dizzy to the negative side
yeah you need to put battery negative to the engine or gearbox somewhere, and battery live to starter