5 pin for a 4 pin

Well after alot off wire ohming and voltage testing,I traced it all back to the coil.Found out that my coil was bad or going bad. I put a coil in that was lying around and she fired right up and purrs like a kitten once again.I'm glad I kept on a trouble shootin,because I almost spent 50 bucks on an ecu.Thanks to all for there inputs of wisdom.Mark