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SportTrac Discussion
Engine & Drivetrain
Sport Trac a little trouble starting?
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<blockquote data-quote="scott degroot" data-source="post: 855836" data-attributes="member: 66039"><p>In regards to Richard L post</p><p></p><p></p><p></p><p>On any Ford vehicle with an electric fuel pump the fuel pump runs for 2 seconds when the key is turned on. It will shut off after that and will not run again until the the key is either cycled off and then back on or the key is turned to the start position or obviously if the vehicle is running.</p><p></p><p></p><p></p><p>These years ST do not have a fuel rail pressure sensor so the pcm has no clue as to what the actual fuel pressure is. Not trying to be a ahole here but wherever you got the information about the pcm turning off the ignition due to fuel pressure not being seen is completely wrong. On vehicles that do have a fuel rail pressure sensor they also usually incorporate a fuel pump control module that controls the speed of the fuel pump. Now in this situation if the fuel rail pressure sensor didn't see fuel pressure the control module would send full voltage to the fuel pump in an effort to increase fuel pump output, it would not and never will deactivate the ignition for not seeing fuel pressure.</p></blockquote><p></p>
[QUOTE="scott degroot, post: 855836, member: 66039"] In regards to Richard L post On any Ford vehicle with an electric fuel pump the fuel pump runs for 2 seconds when the key is turned on. It will shut off after that and will not run again until the the key is either cycled off and then back on or the key is turned to the start position or obviously if the vehicle is running. These years ST do not have a fuel rail pressure sensor so the pcm has no clue as to what the actual fuel pressure is. Not trying to be a ahole here but wherever you got the information about the pcm turning off the ignition due to fuel pressure not being seen is completely wrong. On vehicles that do have a fuel rail pressure sensor they also usually incorporate a fuel pump control module that controls the speed of the fuel pump. Now in this situation if the fuel rail pressure sensor didn't see fuel pressure the control module would send full voltage to the fuel pump in an effort to increase fuel pump output, it would not and never will deactivate the ignition for not seeing fuel pressure. [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
Sport Trac a little trouble starting?
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