Okay I did the DOHC ZC swap into my 1990 Civic HB SI. Right when I start the car it doesn't misfire but about 10 seconds of running it starts fairly heavily. It isn't to the point where I have a cold cylinder or anything but it is defiantly a problem. I replaced cap rotor plugs wires its got a new injector in cylinder 1 new O2 sensor because that was coming up on my check engine light. I don't know what else it cold be. HELP ME PLEASE!!!!!!

 

your plug wires are hooked up wrong?

FIRING ORDER = 1-3-4-2

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looking at the engine from the front, it goes 4-3-2-1 (left to right)

 

nope the order is definately right, nice diagram though!

 

i'm gonna go with (listed likely to least likely)

#1 timing specs are off
#2 firing order (spark plug wires)
#3 distributor
#4 distributor cap/rotor
#5 crankshaft position sensor