Rep Power: 0

my 97 civic d16y8 wont start when at operating temp. its starts n runs fine until u turn off, then it wont start until it cools down. ive replaced the coil, igniter, plugs, wires, cap, rotor, fuel filter, even the main relay. there are no codes on the ecu. im out of ideas.....

 
Rep Power: 211

This could either be really simple... or really bad. Does the car at least turn over or does nothing happen when you turn the key? Can you push start it?

 
Rep Power: 0

its starts and runs just fine until the key is turned off, then it has to cool down to restart, but it does turn over, ive checked for fire and am getting spark while its doing this, its automatic so i cant push start

 
Rep Power: 211

First I'd get your alternator and battery tested. If those come out fine check your fuel pump sensor, if not that then check the fuel pump itself. If the car is turning but not starting then there's spark but no fuel.

 
Rep Power: 0

fuel pump working just fine

 
Rep Power: 211

Ok, then certainly get your alternator and battery tested. If not, I did a simple google search "Car won't start when hot" and got about 1489107824012 search results.. first 6 results:

http://sg.answers.yahoo.com/question...3105859AA46Pla
http://www.car-forums.com/s9/t3615.html
http://ls1tech.com/forums/general-ma...-hot-help.html
http://www.car-forums.com/s9/t13361.html
http://www.rx8club.com/showthread.php?t=155305
http://www.audiforums.com/forum/gene...tart-hot-8842/

 
Rep Power: 211

edit..accidental double post

 
Rep Power: 0

try the coolant temp sensor

 
Rep Power: 0

ect sensor was the problem