Hello, I will take a stab at it. Take a look at the original module you took out. Was it a 4 prong or a 5 prong ECU? Make sure you replace with the same number of prongs you took out or it won't fire.
Nonsense. The originals were 5 prong, and most modern replacements are 4 whether they have 4 or 5 physical pins. A 4 pin will work where a 5 pin was originally.
THE ONLY DIFFERENCE is that the 5 pin was supplied power through the 2cnd resistor. A 5 pin box MUST have a 4 pin resistor.
A 4 pin box will run with either a 2 or 4 pin resistor