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Old 01-28-2009, 09:21 PM   #1
JTsStang
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Fuel pump pegging

I did some datalogs this past weekend and found out that my pump is pegging at around 11psi of boost. It hits1.0 but it doesnt lean out. It is a pump out of a focus 03 zxt I believe. Does anyone know where I can find the wiring upgrade kit. Is this normal for this pump to peg like that?
Thanks in advance for any response. I,m datalogging with a x-cal2.


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Old 01-29-2009, 08:23 AM   #2
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Originally Posted by JTsStang View Post
I did some datalogs this past weekend and found out that my pump is pegging at around 11psi of boost. It hits1.0 but it doesnt lean out. It is a pump out of a focus 03 zxt I believe. Does anyone know where I can find the wiring upgrade kit. Is this normal for this pump to peg like that?
Thanks in advance for any response. I,m datalogging with a x-cal2.
I am guessing you have a mustang with the SVT focus pump. I had the same setup in my 01 procharged GT. What power level are you at? Mine held fine with around around 400hp after the wiring upgrade. I have since swapped in an 03 cobra tank and pumps to handle any future upgrades.

I would recommend checking out modularfords.com as they have a thread there from someone that did the upgrade full of pictures.
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Old 02-03-2009, 12:18 PM   #3
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my friend's JRSC focus pegs at 1.0 all the time but he runs a cool 10.1-10.3 afr the whole time...

as long as your fuel pressure stays high enough I wouldnt worry about it.
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Old 02-03-2009, 02:16 PM   #4
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what does it mean to "peg"
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Old 02-03-2009, 02:19 PM   #5
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max out the voltage range (duty cycle)

for instance, pegging the MAF is when the MAF sensor reading is 5V
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Old 02-03-2009, 02:44 PM   #6
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thanx for the info
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