misfiring mk3 golf gti 2.0l 16v

[fazzer]

hi everyone
i hope someone can help me.i have a 1996(p-reg)golf gti 2.0l 16v.the problem i have is as the car warms up it starts to judder,misfire when driving along,if i press the clutch and rev the engine it sounds a bit ropey.this only happens now and then but is starting to happen more regular(used to be once a week,now every day).i have had it plugged into a ecu reader thing and no faults showing or any history.the only thing that was found is a slow reacting o2 sensor. i have replaced the fuel filter,no joy.ive fitted new ht leads and dizzy cap and rotor arm,still no joy.removed the throttle body and gave it a good clean.also found the hose from the block upto the air system(not sure what it is but think it is a breather) had a big tear in it so have replaced it but still no joy.im clean out of ideas so if anyone can help you will be very much appreciated
thanks in advance

[carelectrician.co.uk]

Hi Fazzer, mk3 golfs are prone to power relay problem, no.30 in relay plate above fuses, also hall sensor pick up in distributor (if fitted with a 3 pin plug). Change relay first. Regards, phil

[fazzer]

hi
thanks for the info,ive tried the relay and still no joy so will look at the hall sensor.