Emissions Problems with my 94 ZR2

[Trucks!]

OK guys, ive been reading some pasts posts and you all seem to know what you are doing. I have a 1994 S-10 standard cab, ZR2, type. With 31' Bf Goodrich AT's. Its in near perfect condition no rust ect, ect. My problem begins when i when it takes a long time sometimes to start the motor, or when im at a stop and go light, or jsut in park, and it idles sometimes very rough. It has a new fuel pump, new fuel filter, new EGR valve, new cap and rotor, and plug wires all within the last couple months. I plugged it into the computer and there are no trouble codes of anykind. I have the 4.3L "W" model engine, supposedly high output or something, beats me. So i went to emmisions and it passed everything but the HC which means that there is too much fuel coming out the exhaust. I checked the fuel pressure when its running, im pushing just about 50 to 55psi of fuel pressure, and all the vacuum hoses seem to be fine too. The problem comes when the fuel pressure sames the same throughout the whole rpm range. I found that a little weird. Im getting ok gas milage, but i need to fix this problem soon, because it has to pass emissions, BTW, i live in Wisconsin. I'm leaning towards the fuel pressure regulator. If anyone has any suggestions or input id really appreciate it. Thanks!

[OverBoardProject]

Several years ago the emissions testers in BC Canada were proven to be inconsistant from 1 machine to the next. So the 1 car that they tested passed at some test stations and failed at the next. I hope that they resolved this problem, but going to the next test station might just get you a passing score.

There is another way to help older cars pass the HC test.
Plus it might get you better gas mileage as a side benifit.
But you'll have to read about it in these 2 web pages.
read the Additional Benefits in this top one
http://www.timebomb2000.com/vb/showthread.php?t=143848
http://www.automotiveforums.com/vbul...d.php?t=385048

I tried it with my Blazer and noticed a big difference