Hello I posted last week about getting lost keys replaced. I have just gotten this vehicle really cheap. I had key made and change intake manifold gaskets with felpro kit. finally got it started after 5 minutes of trying. ran rough and revs were up then down. when i drove it up the road it would sputter n almost die. It got up to temp and smoothed out. So i put gas in and some lucas to see if my injctors needed cleaned. Drove fine for about 40 minutes. shut it off and took another 5 minutes to get started. drove home fine. this morning hard start and then revs up and down. Any help you folks could give me would be greatly appreciated. Thank you for your time.