Hello, I am desperate, I have a 2001 Chevrolet Corsa that when I brake or unhook the changes, the rpm drops to 400 and the car shivers and almost shuts off as it has less force on long journeys, the power began to fall and the accelerated rpm began to fall Start engine check. I turned it off and turned it on again and it was taken away as data when I turn it on all right, turn on the key but when starting to walk it starts with the problems before mentioning I don't know what to do please help if you can specify what it is and if it was a sensor Tell me which of all since they told me that it can be that. Thank you very much, I am totally attentive to your comments.

As we walk with the wires and spark plugs, how long have you not changed them? The sensor that you can control with a tester is the TPS (butterfly position sensor). Do you know how to use the tester?