96 civic b20 swapped
wont idle using stock ls ecu with obd2a to obd1 jump harness but it drives fine only seems like it wants to stall out on stop...

also already tried couple other ecu's and it does same thing..

 

check for vaccum leaks....

 

ill trade you cars my EM1 for your car lol jk how would you go about checking for a vaccum leak

 

hissing sounds......feel for air coming out of places where their not suppose to...

 

check everything no leaks, its weird how i use stock dx ecu and it runs better except that i de-pin the ecu signal just so i can drive it a lil better.. dives better thatn the obd1 ecu..