[Wayne in NZ]

A new development this morning.
I removed the INJ jumper and using two jumpers from another old pc board at work made up a cable with a jumper on each core and routed them to an MSD RPM window switch via a relay, as we discussed by email earlier. I have emaild you a pic of this as I cant post pics here.
This has been working fine until today.
Once the system goes through its start up sequence it then begins to deliver fluid at the full rate. I am unable to reduce the rate of flow.
I have removed the "INJ cable" so that there is now effectively no jumper and it still goes to full flow.
If I turn the Threshold trimmer CW a little, from say 7oclock to 9 oclock, it stops. Something appears to have gone haywire I think.
Your thoughts?