Hey Guys I have a 1998 Z28 the car has been sitting up in my garage for the past year. I took it out to drive it and its hesitating to start sometimes. once it starts up its fine but some times it will take me a couple minutes to start it. But sometimes it starts up with a little bump. What could that be caused from?

 

this is the lt1 engine page

 

put in some sea foam and check your fuel pressure.

 

Leaky injector seals is my guess.. But non lt1 dunno..