well my car has had many problems before, which i have fixed...before. but now im stumped. i went to start my car the other day and right when it started to fire it died...totally dead. so i did this again, it dies right after i start it. id say about a sec between when it starts and when it dies. i dont get it. then i got it started. im driving to the store going about 40 in 4th and it dies again. just driving! i couldnt get it started again and i had to have it towed. i dont get what it could be? i know im getting enough spark and gas but its just dying. by the way its an 86 crx dx. ive had most of the engine replaced or rebuilt except the lower half of the engine itself. so im really stumped....please help!

 

check main relay under dash...common thing that breaks due to age.