help! no spark to cylinder #2!

[tOfubOi]

ok guys, can you give me a possibility on what can be wrong? i just installed a redtop into my s14. everything was running fine..then i moved the ecu and it made a clicking sound and the red light turned off/on(either one i forgot which). the car idled rough and eventually died out. tried to start it again, it idled funny, so we checked it out. unplugged injector #2 and the car didn't bog. switched the coil pack and spark plug and still no spark. Weird thing is, there wasn't any spark the first time we started it up, then eventually stopped working on the car for at least a week, then there was spark, but now no more. im guessing it's either loose wiring, the ecu, or the ignitor? help please. thank you

[shayrgob240]

ok guys, can you give me a possibility on what can be wrong? i just installed a redtop into my s14. everything was running fine..then i moved the ecu and it made a clicking sound and the red light turned off/on(either one i forgot which). the car idled rough and eventually died out. tried to start it again, it idled funny, so we checked it out. unplugged injector #2 and the car didn't bog. switched the coil pack and spark plug and still no spark. Weird thing is, there wasn't any spark the first time we started it up, then eventually stopped working on the car for at least a week, then there was spark, but now no more. im guessing it's either loose wiring, the ecu, or the ignitor? help please. thank you

check the resistance of the the #2 spark plug wire.

[tOfubOi]

by using a multimeter right? there was current running through..