My brother recently purchased a '91 auto super coupe. car ran well for a few weeks. I am told the vehicle would not start occasionally. He recently replaced the DIS module, cam sensor, crank sensor, ignition coil with no luck. He also has another EEC that is currently installed. Car sounds like it wants to start and occasionally will pop on a couple cylinders but not start. plugs and wires are new, although I bet the plugs are fuel soaked. OB0 is not my specialty, I work on OBDII vehicles currently. I have a new balancer that is not installed, when i removed the original balancer nothing was damaged or loose. maintenance records shows the previous owner replaced crankshaft bolt only, which through my research is a no-no and should be done with the balancer. At this point i want to start completely from step one and go through all wiring and checks. I had a code reader and service manual. only codes I am currently getting with the newer EEC installed is 114, 116, 212. code 212 says no input tac to eec (spout). i found what i think is the spout and it is clean and installed. Currently I am running to have the DIS MODULE checked at auto parts store and grab some testing leads to check the spout wiring from DIS connector to EEC. Where can i start with this ? Brother is ready to junk it and buy another vehicle.