4azge starts but wont hold idle

[pjay]

i own a 1992 gtz levin and just tonight it caused me a problem and i have no idea what it could be. ill try explain best i can.

i drove the car this morning and it was fine. nothing seemed the slightest bit wrong.

After that morning drive i moved my battery a smidgen to the left and also regrounded it with thicker cable. When reconnecting the battery, my alarm went off, so i simply disarmed it with the remote..

Then after reconnecting the battery the engine keeps misfiring!!!

it starts fine, then it misfires, idling down to 1000 and even lower. when i depress the accelerator the revs climb and then suddely drop when the accelerator reaches a certain point.

sounds like broooom-pop-broooom-pop pop pop broom-pop broom brooooom-pop-broooom-pop broooom

when i depress the accelerator it goes broooOOOOM - blugh then the revs drop severely

i checked the air intake and the suction is fine. its making a kindof whistling induction noise but i figure thats the supercharger.

i can also smell petrol which wast there before.

could it be a spark plug? could it be my immobiliser cutting off fuel? i have no idea what it could be. plz help me!