civiclxb16a

ok i had a code 22 and i fixed that. went for a spin and no vtec! and i made a discovrey. the tach was not working and i was thinking that maybe there is no rpm signal. now i was wondering what wire from the dizzy can i run to the ecu to get direct signal? the motor is a 94 lsvtec the car is a 99 ex. wiring harness is from a 99 si. ecu is a chipped p28. please give me a hand!