Hey guys im having starting troubles with my s2000. If it is a cold start i have to unplug the crank angle sensor in order to get it to start but it wont rev over 3000rpm then i plug it back in, shut it off then start it and it runs fine.. Initially i was thinking the cas was going but now im having issues with the car over heating cause the fan isnt coming on..

Could the coolant temp sensor be gone and could that be why it wont do a cold start. Im not sure how the electrical on these engines works thanks guys..