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1990 F150 302 EFI rebuilt engine runs well until it reaches operating temp then enginerpmfalls out and hard restarting What is wrong?
Wiki User
∙ 13y ago
Although I am no expert, my experience with fuel injection tells me that once the engine reaches operating temp, the fuel injection computer Will lean out the mixture, similar to turning off the choke on a carburetor. check your o2 sensor and you block temp sensor. some vehicles even have sensors in the throttle body itself to sense engine operating temps. One of these items could be bad or not have a good connection.
Wiki User
∙ 13y ago
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