Detecting manifold leak + o2 relay check

[ESSSupreme]

Two questions, I opened up my ECU box to check if heater relay is there and it looks like it's in; did not have time to get to it. If heater relay dies does anything else go besides o2 sensors?

Does this wiring look good:
http://imgur.com/sWTJLl.jpg
Furthermore, what is the straight forward way to diagnose manifold leak; somebody told me you need to spray brake cleaner in manifold but I honestly could not find any holes that lead to it (other then icv/throttle body but those needs to be on in order to test).

Thanks!

[RWDBandwagonder]

That is the straight forward way, if you cant find any leaks like I did, just start throwing money at it if you dont want to pay for a smoke test, my leaks were so small a smoke test couldnt find them, it ended up being my PVC gasket(it was like hard plastic) and my FPR vac line.
and have you tried testing the o2s and the continuity between the heater pins?
the Bentley goes into pretty good detail about doing it.
section 130-12, page 178

Im 2/3 sure mine are out, but im not even bothering to test them because its just maintenance, they come in the mail tomm, but alot of my symptons have been the same in your threads. Try to test the o2s before anything else.

edit wait...are you spraying stater fluid into your manifold? you need to spray areas you think might be sucking in stray air/ gaskets, hoses, you know, the good stuff.

[Binjammin]

Nice ebox, is the rest of the car that clean?