Ok I have a 91 camaro rs 305 tbi and the problem im having is there is about a 2 second delay when I floor it before it accelerates. I have had the fuel pump, iac, pcv valve and filters, fuel filter, egr valve and cap rotor and plugs to include wires all replaced and still nothing also it has a new cat with exhaust. My next step was the to check the timing and possibly a compression test but can anyone help me out to find out what this is-thanks