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87 ranger new fuel pump & ignition module runs good in the cold no in the heat

(1990 Ford Ranger)
in Terrebonne, OR on July 12, 2014
good there be vapor lock from the lift pump to pressure pump when this happen there is no power to pressure pump I have by passed the inertial switch it only happen in the high heat of the day give it 45 mins then it runs?? how long you never know.
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