Yea just bought a greddy kit for my 98 integra Gs-R and i have everything installed and when i started my engine it had a werid *** idel and while on the tes run it died out 4 times with the check engine light blinking. I got the codes from jumping a wire and it was saying 73,72,74,71 and i looke them and it said cylinder 1,2,3,4 are mis fireing.
I checked all my injectors and they work, i double checked all the vacum lines and nothing leaks, the only thing i think the problem could be is the FMU. I have a apexi VAFC hooked up to it and then hooked that up to my OBD 2. Also i am using splices to wire things to gether.

 

I think you killed your sparkplugs

 

Most of the gsr greddy kit users have this problem. I also have had this problem for about a year and it seems not to put my car into limpmode. I pretty sure that the wires from the injector clips just need to be soldered and shrink wraped. I would also take out the VAFC cause that might be causing your car to stall ,cause mines never stalls out.

 

check your firing order and spark plugs.
also double check your timing.