Help me find this problem..
 

After roughly 10 minutes of running, the car will start to skip very badly. The A/F guage doesn't seem to be functioning properly and when the car starts acting up, the fuel pressure according to the guage is now at 40-41 psi compared to it's otherwise 37-38. I have checked many of the plugs (the one's I can get to with time constraints) and they were all fine. I replaced 02's last week and Seafoamed the car about a month ago. Autozone can't scan it because of the OBD2 connector/OBD1 PCM problem. I have a Scanmaster now, I just have to find the time to hook it up. So can anyone point me in the right direction with this little bit of info? Thanks in advance.

First, hook up the scanmaster! Then start poking around on it. I would look at IAC counts (which should be between 20-40 counts at idle), since you replaced o2s, just make sure they are working fine (should go lean to rich, roughly from 100, which is lean, to rich which is a higher number like 800). Next check your rpm. See if it goes up smoothly. THis is how i found my problem. My rpms went from 1200 to 1300 to 5700! i knew that couldnt be right. Check the block learns and see if tehy are close to 128 after closed loop. If they are 107 or 134 (examples) then you have some type of problem. Also look at the history codes.

YOu will start to connect the dots when you use the scanmaster, or any scan tool. Alot of things are interconnected. Good luck, pm me if you have more ?'s