say no to 2 ecus!!!
i'm not in the mood to check it now, bu tthe powersteering has a ECu feedback of somekind ? which is probably why it raises the revs when at stering reack limit... wither that or its the stall converter thingio(whats it called again?)
purve valves, TPS, MAF, CPS CAS, IAC, firing order (not a big deal on most 4 cyl cars), coil setup, reverse
cluctch switch is impotant to idle control, as is the netral switch - those 2 are linked, oil pressure, alternator voltage (measureable at the connection point for ECU)
umm thats all i can think of that would need to be accounted for...
guys if you want to know the I/O of the ECU check out the wiring diagrams on floptical