how do i know if my computer went bad my car is a 87 350tpi camaro it it runs funny all the time idles some times high sometimes low misses all around and i have no codes

 

I found a thread a while back about checking to see if the computer is bad. Don't remember exactly but when you turn the key to the on position and watch the check engine light. If it blinks once quickly then it's good.. but if it is steady on that means there could be a problem. Probably best to do a search on it.