Summary of information from manufacturer:Ford has supplied information requested concerning vehicle populationand the number of complaints.analysis:the problem appears to be one of excessive heat collecting under thevehicles, usually while stationary with the engine idling.this heatcauses the fuel to vaporize in the fuel tank and develop pressures inexcess of what the vent system can handle.status:ir to Ford sent on 2/20/87. Meeting with Ford and final stage manufactur-ers held on March 11 & 12, 1987. Additional meeting held on March 7, 1987.also on April I, 1987.Ford announced service campaign, no safety recall.recall request letter sent on 4/7/87. Ford did not agree to a safetyrecall, consequently a panel meeting was held on 4/29/87 and investigativecase C87-003 was opened.this ea was closed as a result of the case open-ing on 4/27/87.===