i have a 94 camaro a4 with lt4 hotcam i just installed a couple of months ago. before i installed the cam i replace the opti cause my water pump went out and screw it to hell. the problem i am haveing is the car will start fine in the morning but when it get warm and you let it set for about an hour is doesnt start right up it spins over and sometimes pops before it starts and its done it every since ive had it. next if you rev it up it will pop through the air cleaner sometimes or act like it is bogging down sometimes aswell but runs good orther than that.