This is what happened on mine ... was intermittment for a couple of days, right up to when the Throttle Control Body failed and put the car into limp mode.
If you need a Throttle Control Body, I have a 3.0 V6 one listed here on the classifieds, under used parts > engine category. Includes Free P&P and is all packed ready to go... so if you need it ASAP, I can ship it to you either same day or next day. If memory serves £69.00
These were the Error Codes I had on my ECU read..
"P1690" Safety Fuel Cutoff (80mph, fkin tell me about it ) and
"P1120" Motoriser Throttle Control
I was keeping it as a spare for myself, but having bought a Ragazzon Quad DTM - I could do with some money :lol:
Here is a direct link to the Ad - Buy It Now via PayPal ... I'll get a notification to me mobile mate, so I can get it out to you Monday - If you add on £5.00 I will upgrade the Free delivery from economy to NBD Special Delivery by 1pm so you would have it Tuesday mate. Cheers Paul