I went and cleaned the ground that was the initial problem but with the car out of gear it hit's a little over 4k and cuts back like it's hitting a rev limiter.. Maybe I'm just now noticing but the check engine light flashes at the exact same time. Is there something wrong or has it maybe been set up like this? The guy I got it from couldn't tell me anything about the car besides it had a turbo on it lol so I have no idea whats in it.