i have a 91 camaro z28 with a 305 bored .30 over. After getting the car to operating temperature it wont start. If i let it set their and cool down it will start right back up about 20 mins later without spray starting fluid in it. I figured it may have been the fuel pump getting weak so i changed it, then i changed everything in the distributor as far as the button and cap, changed wires and plugs, and its still doing it. When it wont start i throw my fuel pressure gauges on and its normal, and i check the spark and its good. I was thinking maybe the security but all i have to do is spray starting fluid in it and it will fire right up. Any suggestions or anything would be great! Thanks

 

Sound similar to what I was JUST going through. I see you did install a new cap and rotor, did you replace the ICM? I did and problem solved. I also read here the fuel injectors if old as well as the coolant temp sensor can be the issue too. Hope this helps!

 

Nah buddy i sure didnt replace the ICM. And yea after getting use to this site i seen some people talking about injectors could be the issue. And i didnt think about the coolant temp sensor that didnt cross my mind forgot about that. But thanks man ill try that and see what it does. Appreciate it!!!!!

 

DARN. I know the fustration but stick with it, you will get it fixed. I love this website, so many cool folks helping out. Let us know how it works out for you and best of luck!

 

I doubt the IAC valve too...

 

Let us know how things turn out! all the best.