hello,i know this thread is on this site somewhere but was hopeing i could get some more recent responses.i have 87 iroc lb9,when the car is cold like not driving it for couple days i could just bump the key switch and it will fire right up(i have had it sit for over a month and it fires right up).the problem is when i drive it for a few minutes or longer it is very hard to start??i have update to an lt1 starter,the car will crank over like a champ but it takes a few seconds to start.new wires,cap,rotor,plugs,coil,altinator,battery,cleaned throttle plates,iac valve,no service engine lights.any help would be great,o ya the car runs fine when it starts.thanks matt