97 civic wont start it has spark gas and the timing is right. firing order good too. spark plug looks o.k. im thinking it might me the crank shaft position senor but there is no check engine light on. it was over heating the day before it started to acted up. i turn the crank pully and check to see if all the piston is moving and they all moved. its an automatic. i dont think its the headgasket because there no coolent in the oil.could it be the main relay or the ecu.

 

yea i had the same probalem with my 92 hatch and it was the main relay under the dash went to the local juck yard and bought like 3 so i could be sure also one of the fuses was bad under the hood it didnt show bad but it was .

 

Does the starter turn over?

 

What color is spark at the plugs?

If what you mention above is all correct, then compression test the cylinders.

 

do what ronj@ht said.
do a compression test. and if everything check out, do a
leakdown test

also check your main relay