Drove my '04'supercharged rocket home last night. 240 miles on motorway grinning right up till the M1 turnoff . . when I rolled the throttle off for the roundabout. Revs stayed at about 2500-3000, until I pulled clutch in to slow down. Understand this may be crankshaft sensor (checked and was spotlessly clean). Now going to have to buy a TPS to try that. Anyone got any other ideas? Also would like to find an experienced midlands based tuner with rocket knowledge to try sort it out; not a big fan of dealers - they are at work to make maximum money