Originally Posted by
peachy
The crank sensor is only there to pre-determain TDC, the EDIS unit will fire a spark 90degrees before top dead centre then it will send a signal to the EEC setting a binary adress for each cylinder TDC then the EEC will reset the spark for Top Dead Centre. Is it possible that the cam is 360degrees out?? It should have 2 turns per 1 crank revaloution.
What? There is no voodoo like that going on, there is just PIP and SAW signals. One is the effective crank signal to go to the ECU so it knows the crank position (and in conjunction with the cam phase sensor, it knows what cycle its on), and the other signal is the modifying spark angle from the base 10 degrees that the EDIS module operates from (basically).
EDIS-4 always has a trigger point of 90 degrees BTDC. There are certainly no sparks being fired here!!!