Rev counter works then stops
 

Hi everybody, I have Toyota coils on my mk1 eunos, have a MSPNP1 ecu and the rev counter didn't work so I bridges a 1k resistor between b+ and IG- in the diag block.
rev counter worked for about a minute then stops. it does this every time so every morning I start the car the rev counter works then stops after a minute.
Very unusual situation, never seen anyone post a problem similar to this before, hopefully someone can shed some light on why it just decides to stop working everyday?

Solved :D bad continuity in the plug for the ignitor