2000 Sentra, no spark on cyl #3 HELP PLEASE

[luthoro]

I posted this over at nissanforums a couple days ago but there are supremely useless as I have gotten no replies.

I bought a 2000 Sentra GXE today. 163k miles, autotragic transmission. Well I only paid $700 for it because it was no running one cylinder #3 but it had compression so I was thinking it was probably a coil or whatever. Something simple? Not so much. There is no spark on cylinder #3.

- its not the coil (replaced then swapped around, whichever coil is plugged into #3 does not fire)
- its not the spark plug (changed them out)
- its not the wiring to the electrical connector that plugs into the coil at #3, I check it with a multimeter, voltage levels are exactly the same as all the other coil connectors when the car is running.
- I also tried changing the cam position sensor but that didn't help

Throwing 2 codes, 2x each:
- P0303 which is misfire on cylinder 3 (duh!)
- P1140 which is something about a valve timing sensor? Could this be the cause, where is it in the car, and where can I buy one? I searched AutoZone's website and they don't have it listed

It seems like the coil is getting power but not the signal to spark. The only thing left to try is the PCM I think, because it tells them when to spark? Am I on the right track or is there something else to look for? Seems like a very simple coil-on-plug ignition could only have so many things causing this to happen.

PS. I don't know if this matters or not but I believe it is a California car, it has four O2 sensors.

Please help I need to get the car running properly ASAP!

[luthoro]

Okay I was just outside staring at my engine some more, willing it to just tell me whats wrong.

On the coil connector there are three wires in this order + - IB

What does the IB stand for anyway?

I noticed there is a little bit of insulation missing from the blue wire labeled IB that runs into the coil #3 connector, but its RIGHT behind the connector, there is nothing metal close enough for it to be grounding on or arcing too. Could that still possibly be my problem?

[luthoro]

Okay so sealing the portion of wire that was exposed made zero differance, still no fire to cyl #3. PLEASE HELP!!!!!!!!!!