When starting my car some days if I turn the key to fast it turns over a few times before starting, the rpm gauge doesn’t work and the car stalls out and doesn’t have full power. So if the rpm gauge isn’t working I shut the car off wait a few seconds then turn the key slowly rpm gauge on and starts right up full power now. I have no clue what this could be. I was thinking maybe something with the ignition?
First thought would be ignition switch. About the only way to be certain would be to test the wiring and switch to see what isn’t present when the issue occurs. Other than that about the only other thing I could think would be to check and clean the battery connections at the battery.