i have an 87 jeep comanche with a 4.0L that i just put a new engine in , but it runs like it has a miss and is extremely hard to start. I checked spark and its great, and took a test light and started to test if all my injectors had power to them. Come to find out my number two cylinder has no power. Ive traced the wire but can't find anything wrong but still do not have any power. Any ideas?