Before the valve adjustment, @48psi idle was fine (725-750rpm). Once I got my car back, idle was really rough @48psi (600-680rpm). Two sets of plugs were fouled out. I got the valves adjusted again by a different (Known for great valve adjustment) mechanic. He said the prior adjustment was off both on the intake(loose) and exhaust(tight) valves. Same ****. Here is the deal, with the cam gears set at zero the idle is fine, but as soon as I degree them idle gets rough and starts to run rich again. I would have to turn the fuel pressure down to 30psi just for it to idle good. When I drive around there is no problem, the plugs are fine when check right after, but if it idles for 3-5 Min. plugs get black and rough idle starts again. I tried advancing the intake cam, retard the exhaust cam, same thing. I tried reverse, retard intake cam, advance exhaust cam, same thing. Tonight I'll be changing the o2 sensor and distributor. I'm open to any suggestions.

Stock GSR B18c1 (obd1)
Stock Ecu (replaced chipped ecu)
Iceman Cold air
Mugen 4-1
Walbro 255 intank pump
Straight pipe to a Apex N1
AEM fuel rail (stock injectors) w/guage
SX fuel regulator
MSD Blaster 2 Coil