Twice now suddenly had no throttle response - bit dangerous really!!
Disconnected the tps then reconnected and got it going each time.
looked in the manual and measured the tps. One value was out, pin 4 to pin 5 should be 0 ohms with throttle closed, I get 50 ohms so it looks like I need a new sensor. I guess Mitsu will charge an arm and a leg in the uk for this...anyone else bought one?

 

Just phoned Mitsubishi - they want £365.65 + vat!!!
What a surprise you have to buy the whole assembly not just the sensor...
Anyone know of a good breakers near Swindon!