well, bad hego does not cause it to run lean, perhaps some leak does. you wouldn't happen to hear any hissing or somep'n? what was the condition of the o-rings? did you change fuel pressure regulator during the rebuild?
firing diagram according to Haynes
465 <--coil pack
321
1-2-3 <--engine
4-5-6
front of the car
i can't doublecheck right now cause it's dark outside
but I'm sure you have the same. kinda hard to get this one wrong...
did you try to run a compression test? shouldnot be hard to do.
I would also suspect cat, as others indicated.
your CEL did not come up b/c you just reset the ECU. it needs to accumulate several fault codes before it lights CEL up.
hth
