94 accord swapped with a h23 starts right up when cold, once it warms up it dies and refuses to start again. Any ideas what could be csusing it

 

from what ive read on here could be possible main relay. a symptom of that was once the engine is hot dying and not restarting until it cools enough.

 

also if this is the problem it can be repaired. you can resolder it. itll save $$$

 

Are you talking about the big relay in the fuse box?

 

How about we start with finding out what is missing when it dies and won't start back up? It costs a whole lot less than just guessing IMO.

When it dies. Are you getting fuel to the fuel rail, can you hear the pump prime.....heck spray carb cleaner into the TB - open the butterfly - and try to start it.

Are you getting spark, a sprak tester, a good screw driver - proper safety or a number of other methods.