my 90 civic si has a b18a1 in it its converted to obd1 just put the motor back in from a fresh build got it running fine for about a week then in died to 1 cylinder i swapped dizzys,coils,ecus,chips,checked wiring all good voltage and ohms, resistance sensors, ect, random death

 

HAVE YOU CHECK THE IGNITOR.

 

ya i did it will not recognize the tdc sensor im wondering if something is wrong with the no1. cylinder position sensor which would casue it not to read tdc so that might lead to a faulty dizzy but i put in a dizzy that i knew worked and it still did the same thing i doubt both dizzys went bad but who knows ima tear down the dizzy and inspect futher ill keep up with the progress. any help would be appreciated

 

what i would do is run a direct wires form the ecu to the distibutor, some time the connection could be lost in the wiring. you need to look up which one if the wires are to
the tdc sensor. disconnect the pins from the distibutor and connect them the the ecu.
if it fires up then you know what the proble is. if it dosent i would try a different distibutor.