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Discussion Starter · #1 ·
My 740 starts fine and runs well for about 15 minutes. Then it will start to misfire. Things get worse in the next few minutes until it will not take any load and eventually dies. Spark seems good. I can hear both fuel pumps working and it has a relatively new fuel filter. I have checked vacuum lines and the inlet duct between the mass air sensor and throttle body. I am at a loss. Any ideas?
 
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