Speak to Claire at Dreadnought TVR in Scotland, she knows these inside out. I am pretty sure there is no MAF sensor on it, the ECU reads engine speed and throttle position. Also make sure you check the valve clearance's every 12K miles, and the rads are known to leak. Replace it with an alloy one. We look after a 04 one here and other than a battery, rad and a set of dampers, it never gives and trouble, this is his second TVR in 5 years.

John