I have 01 civic ex runs great when cold but once its warm it wont start back up and theres no codes it has over 170k miles timming belt is in great shape new spark plugs ! I havent check fuel pressure not sure what to do next

 

will it crank?

 

Does it crank? It could be a crank position sensor if it cranks but doesn't start. They're known for having issues when warm.

 

runs and idles good till it warms up! then it dies it will crank but no start and no codes.

 

I'd really check on the crank position sensor (and maybe the cam position too). Shouldn't be fuel, cause than you'd be stalling, I'm guessing it has to be spark timing and if a crank position is not read properly the ECU doesn't know which cycle the cylinders are at... so yeah.

 

its fixed ! I baught a cheep crank sensor worked for a couple days then I checked for codes and there was none so I bought a better quality crank sensor and its fixed . dont buy cheap parts. you get what you pay for!