Golf mk3 VR6 standard immobiliser problems

[flusted 0]

Been asked to look at my mates vr mk3. When i looked, i noticed it starts for few secs then dies.

Took a ht lead off and the spark seems to cut after 2 secs.

It has a immobilser ring around the standard barrel but ive never delt with these before.

How can i test it, or bypass it? i tried the spare key for the car and still does it.

 

Help please

[bigpants baby 0]

Follow the wiring from the reader coil to the transponder box,then wiggle the two connections to the transponder box,if no good give the connections a good dose of wd.

[flusted 0]

reader coil the bit round barrel yes?