I have a 1990 honda accord EXR - 2.2 L engine - when it is hot outside it will not start(75 degrees or more) In cooler weather it starts great and run perfect. [I] have changed the distributor and fuel pump. What do you think

Thanks - Mike

Install a new main relay and you should be fine. It's located under the dash and left of the steering column (hidden by silver cruise control box, which needs to be removed).