man this is annoying

[LER]

ok i drive a 91 240sx with a 93 engine that has about 85K on the odometer, i just pulled my engine to fix an oil leak. before it ran beautifully, but now ever since i put the engine back in at first it wouldnt crank but finally when i get it running it seems ok. well now when i first start up it run like crap and wants to die, i will hold it at around 2500 and it bogs until it stalls. I crank it up it still acts like it is missing. after a few minutes of not being able to rev padt 3 grand it seems to be ok but every now and then after ward it will start to act up again and not rev but then again after a few minutes of trouble its fine. i just put new wires on it and my spark plug are clean. Tomorrow i am going to check the injectors but do you guys know of anythign else it could be? also i closed off the pipe going from my EGR valve to my exhaust while the engine was out, would that cause it to run rough? also there seems to be a short somewhere, when i connect and disconnect my battery a few of my relays kick on and off, with the key out of the ignition, any thoughts? any help is greatly appreciated. thanks

[LER]

ok i pulled out my EGI relay and it seems much better, only acting up every now and then. also when i had my friend reving my engine (before i pulled out the relay), when it would start not to rev past 3K i would unplug my MAF and plug it right back up it would rev like normal. any thoughts? thanks

[NISTECH]

check your grounds they should be located somewhere on the intake manifold probably near the front where the coolant bleeder is or the upper rad hose area. if that dont fix it add an alternet ground to the ground lead of the air flow meter. run it in parallel with the ground of the meter do not cut the current wire.

[LER]

which one is the ground? oh yea today instead of getting better after start up it never quit running crappy. oh woe is me......