My 89 daytona is running beautifully until I go down the interstate for a hour or so then when I get into the city it will barely idle or die all together and surges when I barely give it gas. I've changed the throttle positioning censor. It acts as if it is starving for air

 

What motor is in it?

 

2.5 non turbo

 

Sorry for the delay. Still having problems? I would start with a vacuum test and a quick scan of the ECU and sensors.

 

It's cool but it was a crack in in vacuum and my idle control valve

 

Hey I am new to this forum so I am little confused in making my posts. I am not that much eager about cars so I could not be able to share my experiences. But I hope that I could be able to have some knowledge on cars.