I have a 1992 Honda Accord that won't start when its hot. Con you help me?

MJ, replace the main relay. You are experiencing classic main relay failure symptoms. Here's what it looks like and costs:

Zip Code Entry at PartsAmerica.com (http://www.partsamerica.com/ProductList.aspx?PartType=598&PTSet=A&SearchFor=Fuel+Injection+Relay)

It's located under the dash, left of steering column (hidden by silver cruise control box, which needs to be removed).

I have a 1991 Acura integra and it idles up and down constantly,I tried three different idle air control valves and that wasn't the problem, the vacuum lines were all good there is no vacuum leak that I know of... so could you please help me with this problem?

MJ, here's what it should look like and cost:

Zip Code Entry at PartsAmerica.com (http://www.partsamerica.com/ProductList.aspx?PartType=598&PTSet=A&SearchFor=Fuel+Injection+Relay)