It's a speed sensor switch on the car that needs to be replaced. I don't know where the first answer is coming from. I'm not aware of any switch regarding the speed sensors, maybe I'm tired. I would suspect a problem in the electrcial system- battery, alternator being the most probable. answer speed sensor will not shut down ans engine nor will it prevent it from cranking or starting. sounds like an electrical problem to me could even be your ignition switch most likely in your computer if it was battery anew battery will fix it also a a bad battery will affect your computer alternator will not stop it from cranking
Does it crank faster than normal? perhaps timing chain Check for fuel Check for spark
I put a new crank sensor in it, and now it runs great!
No.
Yes
When you crank it? What are you driving a Model T Ford?
crank position sensor
It will not stay running with out a crank sensor.
Crank angle sensor
Check the cars ignition coil and crank sensor. Either of these could be overheating and causing the car to not start until it sits for a while.
Ran out of gas, failed alternator, crank sensor, cam sensor, PCM, timing belt, ignition coil, fuel pump, broken wiring,
yes
Crank trigger