A blown diaphagm would result in fuel seaping around the WUR.
How long did your car sit during the swap?
Did these problems occur immediately upon starting the new engine?
How many miles have you put on the new engine?
It could simply be that you have gotten some crud in your fuel system when the lines were cracked; CIS is very sensitive to contamination. If the car was down for a time the fuel head piston may be sticking as well. Have you taken it out and ran it hard?
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8