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SportTrac Discussion
Engine & Drivetrain
Why is she dying?
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<blockquote data-quote="hal keiner" data-source="post: 797851" data-attributes="member: 66101"><p>I have a 2002 ST and the schrader valve is on the passenger side fuel rail, on the end towards the firewall (rear). I believe that about 60psi is normal pressure at idle.</p><p></p><p></p><p></p><p>I told this story already on another thread but it is worth repeating...</p><p></p><p></p><p></p><p>I once had a vehicle that usually ran fine but would unexpectedly stall at times. I eventually determined that this was caused by a fuel pump that failed only when the outside air temperature was very high, the vehicle was parked on hot asphalt for a while, and I was at a high altitude in the mountains. Apparently the warmer than normal fuel temperature in the tank along with lower air pressure caused the fuel pump to temporarily fail until things cooled off. It took a pressure gauge to troubleshoot and confirm this unusual cause. I didn't want to spend big bucks to replace the fuel pump on a hunch. I wanted to first confirm that it was really failing.</p></blockquote><p></p>
[QUOTE="hal keiner, post: 797851, member: 66101"] I have a 2002 ST and the schrader valve is on the passenger side fuel rail, on the end towards the firewall (rear). I believe that about 60psi is normal pressure at idle. I told this story already on another thread but it is worth repeating... I once had a vehicle that usually ran fine but would unexpectedly stall at times. I eventually determined that this was caused by a fuel pump that failed only when the outside air temperature was very high, the vehicle was parked on hot asphalt for a while, and I was at a high altitude in the mountains. Apparently the warmer than normal fuel temperature in the tank along with lower air pressure caused the fuel pump to temporarily fail until things cooled off. It took a pressure gauge to troubleshoot and confirm this unusual cause. I didn't want to spend big bucks to replace the fuel pump on a hunch. I wanted to first confirm that it was really failing. [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
Why is she dying?
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