I have a 2001 Z28 with 105,000 miles on it. When the engine is cold it is hard to start. When it is warm it starts with no problem. I changed the plugs and wires about 20,000 miles ago. What are your thoughts?

Thanks

 

first thing to change/test would be the coolant temp sensor. it could be that its gone, and the pcm gets a signal telling it that the engine is always warm, so it wont give enough fuel for a cold start.

 

Thanks for the reply. I'll start with that.