Help! I have a 99 honda civic ex that just dies while driving. It only does this in warm weather though. We already replaced the fuel filter, battery, spark plugs- the fuel pump is not whining. Whenever it goes out- the dash lights also go out. If let it sit for a few minutes with key in on position- the lights come back on and it starts up with no problems

Replace the main relay. The cold solder joints on the PCB are opening on hot days. When it cools down, the joints close and the relay operates normally. Common problem on Hondas. Some people are successful in resoldering them.

The reason your civic dies is your coil is blown. Your coil has to over compensate for hot weather cause you are using more voltage for your a/c. [email protected]

Every answer you give so far, except one, has been the coil and you keep yelling your answer. This is not a case of the coil is no good. Did you read the question? How would you explain the dash lights coming back on after a while? That's not the coil. It's good that this thread is old because you would be making this guy spend money on a coil when that is not even the answer.

Try to be a little more helpful and learn how to shut the caps lock off when you type.

... oh, and don't forget to give me a "not helpful" negative because you feel I've insulted you.

Was the problem solved? What is the solution? I also have similar problem. Thanks in advance.

Shunt18, the classic solution is to replace the main relay. Cold solder joints on the printed circuit board expand with the heat of the day, current can no longer flow, and the car dies. Should the problem persist, the igniter and coil may be breaking down under load (heat). If you replace the igniter, be sure to coat the back of it with silicone heat transfer compound; otherwise, it won't last very long.