Slow to start

Ok, so now I've changed the plugs and plug wires and she is back to running like a stripped ape but occasionally she seems a little reluctant to start when warm. She used to start up immediately but now seems top be a little flooded or lean, it's hard to tell. I've seen a few posts about the fuel preasure regulator. Can anyone tell me where it's located and what it looks like?
Thx
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it is under the plastic engine cover,towards the back on the right hand side it has a small vacuum hose going out of it towards the right,it is about 1 1/2 " round and metal...looks similar to a small oiler can..remove "carefully" the vacuum hose from the regulator end and take a smell if you smell a strong gasoline smell in the hose the regulator is likely leaking pressure,to take it off push down on it slightly and pull away the horseshoe shaped clamp making a mental note of the way the clamp fits on, if you get a big blast of gasoline here this indicates there is lots of pressure in the fuel system...there have been many other posts on this subject here it would be a good idea to search this topic for some of the others openions...news