engine running lumpy??

Right heres the low down

I have a mk1 with an abf engine running on kjet

I was driving thw mk1 about today fine took it to my bros house, then when i left my bros house started the car(started fine) ticked over fine, but any time i pressed the accelerator its was running lumpy like when id put my goot down it would pick up speed anywhere near how it should(aswell as the running issue) 

So i pulled over to turn the car off and then on agen and then when i tried starting it agen it wudnt start, like the battery was dead

So i got me old man to jump start me and it fired up fine, revved the engine on tick over and it sounded fine, so i went on my way and within seconds it was running lumpy agen, just got back home and it wont start agen,

Could a dud battery be the reason why it was running rough?

Thabksr dan

Anyone?

does battery light come on with ignition then go out? if not check blue wire to alternator without this it wont charge properly

have a read of this:
http://www.vwgolfmk2.co.uk/forum/viewtopic.php?f=37&t=25972

and do the usual mk1 fuel system checks, filler neck rust, rubbish in tank etc. also what fuel system have you fitted. mk1 gti tank and pump, or cabrio/scirocco lift pump and reservoir + gti pump? is the fuel accumulator fitted?

The battery light came on but never went out, ive changed the battery john and it seems to have sorted the issue but i will check the blue wire for safe measure anyways

Cheers mate

Right john i think its summat to do with the alternator john cuz its not charging the batery, it doesnt read around 14v wen running but the battery light does go out once the ignition is on :/

Ive checked the blue wire anr everything there seems fine, i never traced it back to where it goes as it wud be a mission for me to trace it anywhere cuz the wires ive had hiden as much as possible

if the battery light isnt on with the ignition, could be the bulb has gone as well as wire snapped.

quick n dirty test for bulb and wire to fusebox is earth the blue spade connector near the battery live, if light comes on then you can rule dash and wiring out.

the issue is from the spade to the alternator, or the alternator itself :