I been having problems with my car. Ls vtec. Every time I start my car, it doesn't stay on for long and dies out. I start it up, goes up to 1k then just slowly decrease either stay at 100 or dies out. Sometimes I have to press on gas to turn on after it dies out. There is no cel. What could be the problem? Thank you.

 

Has it been doing this ever since the head swap?

 

I bought the car with the swap(month ago), but no it wasn't acting like that when I first got it.