Ive posted this on the MX3 site across the pond. baffled by this one. can anyone help?

Hi Guys,

So ive done the swap from K8 to KLDE. I have a few issues.

1. The fan stays on constant.
a. I have KLA2 ecu from 94-95 MX6 im using. (to suit similar year engine)
b. The engine only had one coolant sensor. the loom has two plugs.
c. i re-tapped for an additional sensor.
d. has made no difference. fan still stays on. it doesnt come on when ignition is on….only when you start engine.
e. i have changed sensors. didnt make a difference
f. i have checked tps. didnt make a difference.
THE FAN WAS WORKING OK TO START WITH?

2. The car is a bit jittery.
a. i am using KL02 MAF/VAF
b. sometimes it backfires

Any help would be really appreciated guys.

Thanks in advance
Andy