So ended up keeping my OBD0 B16A from my crx, had the engine rebuilt and installed it into a 93 Del Sol. I had the head sent out, new valves, springs, retainers, valve guides, and valve stem seals installed, had the block bored w/ new pistons/rings installed, all new king bearings, new buddy club head gasket and arp head studs. On initial start up it ran really choppy, and eventually figured out that the map sensor had the wrong vaccumm line ran into it. What im getting is a gray/dark gray smoke out of the tailpipe, now i know thats normally indicitave of coolant getting into the combustion chamber, but, thats impossible as there is no coolant in the engine yet. Could the engine be smoking bc of the spark plugs being black from fuel bc of intially having the MAP sensor getting no vaccum? Or is it normal the engine to smoke some after a full rebuild? im just trying to figure out what could be causing this, timing has been checked, rechecked, and checked 5 more times after, distributor is brand new, already tried another known good one to see if maybe i was getting weak spark, tried using a P30 and P28 ecu, compression is 175 on all 4 cyl's. Can anyone give me any ideas at all besides coolant that can be causing this? any help would be greatly appreciated!