I have a stock fpr on the car, I noticed the vaccuume line is disconnected from it, so I reconnected it and the car runs like crap?? When it's disco'd it runs perfect, I checked fuel pressure it rock solid at 39lbs, So I bought a kirban adjustable, put it on, adjusted fuel pressure to 39lbs, reconnected vaccuume and the car runs like crap again??? I tried upping the pressure, decreasing the pressure, everything and the only way it runs good is when it's disconnected, and the stock regulator is on??? Also pulled my cats and they were melted to golf ball shaped chunks??? The car still runs great, even without the cats right now, but I dont want to put the new cats on until I can figure out whats going on... Please help... I didnt notice smelling gas, and there is no black soot on the bumper... My timing is still at 14* no decrease or increase in power, idles solid???