idle speed motor
After period of erratic revs, I had the sparkplugs, afm, ecu reset all done. this seemed to get rid of the problem till a few days ago. After filling up the tank with Tesco ron 97 (tank had BP ron 95)i had very erratic revs. Could this cause this? The car has stalled a number of times. Having looked in tips one problem could be the idle speed motor. I've tried an ecu reset last night. Initially the car seemed fine, but the problem quickly returned. Tonight i did a throttle reset. If it is the ISM, is it a big job (Do at home), how much am i looking at. Any other suggestions before I take it to a garage would be appreciated. Also the car judders when cruising steady revs below 30.