After engine swap, car has lost major power.

[DJDafreund]

OK, i'll try doing that. And thank you so much again for the help and advice. I'll get in touch with him. I do know only one person that works with me actually that has a 1998 i think civic, but i'm pretty positive he won't go for that idea one bit. Maybe i can just buy one though just temporary for testing. Else, i'll get in touch with that guy and tell him you sent me, and get it chipped. Thanks again. I'm so happy again with my new direction to my irritating problems.

It did actually lope a few times in a row today right after getting some gas. I stepped on the gas petal, and it loped like it was dying out, so i let off, then i gassed it full again, and again it loped. I did this like 3 times, and the 4th time it finalkly started going again.
Boy, thank God this doesn't happen when i'm at an intersection, and need to move, they would for sure hit me if it happened, as my car doesn't move at all and acts like my car ignition turned off when it happens (which is freq.)

[scttydb411]

def have me socket/chip your ecu...i'm pm'ing you my number.

it could be a variety of things, but most obvious is the ecu. a lot of times ecu's will be swapped for different fuel, timing, vtec engagement. this is usually just a band/aid approach and can work, but it's usually a misconceived perception because there is a power loss before vtec and a big bump when vtec kicks in.

your timing could be way off as well. if i socket/chip your ecu and tune it that'll be corrected as part of the tune.

mapsensor is probably ok or you'd have a cel...obd1/2 mapsensors are pretty much the same.

possibly bad engine, but i doubt that if you got it from a reputable source.

plugs, cap, rotor, wires...you said you replaced that already if i read correctly. probably not the issue now.

ruling out any cel, which i didn't see in your post, i'm going to agree with prior answers that it's the ecu.