so i swapped a f22b1 vtec into my car wont start.. i have a weak spark with a external coil IM stumpt on this set up nothing is going right with this swap can any one help.out motor came outta 94-97 Honda accord. an its in my 92 Honda accord onlynd sensor. that is not plugged in crank sensor. i think

 

get a ddm and look for the yellow/black wire at the dizzy harness engine side and hook up your ddm one pin at the battery negative and the red pin at the yellow/black wire you should get full battery voltage. if you got strong 12 volt readings. do this second test. leave the red pin connected to the black/yellow wire but move the black pin to a block ground. if your readings change your not getting proper ground to your ecu and block thus not getting strong spark. also make sure your t-stat housing is clean if its corroded just a slight the ground bundle that goes bolted to it wont ground right and that's your ecu ground