97 CRV acts like it's flooded

several times a week when stopping for a short time on a hot engine the vehicle will be hard to start, the motor turns over fine but you have to crank it for 30 seconds or more before it will fire and there is a noticeable odor of fuel. Sounds like a leaking fuel injector flooding a cylinder to me, anybody have this problem before an? any ideas on how to test my theory.

I took out the fuel rail and cleaned all of the injectors. There was some carbon buildup on them but this didn't fix the problem. I think one of the injectors has a weak return spring but I can't figure out which one. I pulled the plugs to look for fouling but no difference there. no reason to replace just one any way since they're all the same age. The injectors go from $70 to $150 locally but I found a set of four online at injectorwarehouse.com for $99. Anybody have any experience with these guys?