gtconcepts

I just finish building my motor and im trying to start the car but it does not want to i suddently starts and revs up to 2000 and then it shuts down no thrittle respose what so ever, I performed a ecu check and for what i can read the ecu flashes 8 quick times and
4 long flashes with a quick flash , correct me if im wrong but does that means code number 8 and code number 41?

If so how can I check the tdc sensor?


thanks

gtconcepts

I checked the tdc sensor and is with in specs also the o2 sensor cell is gone , im not showing any cells now, what is happening is the that when i start he car still shuts down like if it had an imobilizer if i maintain the key on the start possion the car starts and idles pefect but once i let go it shuts down , I got my stereo stolen while i had the car at the shop rear left side window broken and the ecu is not the original is from another si same year same model..

what could be causing this problem?


thanks