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Fuel Pressure....

  • Thread starter Thread starter Guero
  • Start date Start date Aug 5, 2007

Guero

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Oct 11, 2005
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#1
  • Aug 5, 2007
  • #1
I know stock its at 39psi....at idle. How bout like when u revv the engine???
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
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Aug 5, 2007
#2
  • Aug 5, 2007
  • #2
Stock is 38-39 PSI at WOT (or with the vacuum line to the FPR disconnected, which is close to what the manifold vac reading is at WOT).

At idle with the vac line connected, look for 32-33 PSI (if you're at 38-39 PSI at WOT).
 

Guero

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Oct 11, 2005
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#3
  • Aug 5, 2007
  • #3
Sounds about were im at.....Damn it
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
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Aug 6, 2007
#4
  • Aug 6, 2007
  • #4
Man, you crack me up.
 

Guero

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#5
  • Aug 6, 2007
  • #5
God damn it Hissin!!! Keep it on the DL!!!
 
B

bmac50

New Member
Oct 18, 2006
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Florida
Aug 6, 2007
#6
  • Aug 6, 2007
  • #6
Guero said:
I know stock its at 39psi....at idle. How bout like when u revv the engine???
Click to expand...

Ford says "Key On Engine Off 35-45 psi"
Key On Engine Running 30-40 psi

They don't give a pressure for say 3000 or 4000 PRM
 

Guero

Active Member
Oct 11, 2005
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47
Aug 6, 2007
#7
  • Aug 6, 2007
  • #7
bmac50 said:
Ford says "Key On Engine Off 35-45 psi"
Key On Engine Running 30-40 psi

They don't give a pressure for say 3000 or 4000 PRM
Click to expand...

Wouldn't Ford be more precise?? Thats alot of play
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
Aug 6, 2007
#8
  • Aug 6, 2007
  • #8
They are that broad because of the variety of conditions the fuel systems sees.

It's just like alternator output. It's accceptable from ~13.2 -14.8 volts, totally dependant upon conditions.

Just like with alt output, we can often narrow down what FP we'd like to see at certain times, but the generality still exists.
 
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