I have a D15B v-tec in my 92-92 civic, it shuts off after about a half hour and it won't start back up until it cools off. and it won't start up at all if it sits in the sun all day. please help. it's killin me.i know i'm gonna end up taking it some where and paying 500 dollars for a stupid 15 dollar sensor.

 

I would guess your main relay is bad. The solder melts off of them sometimes, making the car not start when the inside of the car gets hot. It's located to the left of the fuse box. I would swap it out with a different one to see if it keeps doing it.