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do i need a new fuel pump?

  • Thread starter Thread starter pdstang2000
  • Start date Start date Jul 9, 2008
P

pdstang2000

New Member
Jul 20, 2005
17
0
0
Jul 9, 2008
#1
  • Jul 9, 2008
  • #1
hey all,
so my car gives out under WOT at bout 4000rpm. i hooked up my predator and checked the FRP as i drove, and when it cuts out my FRP goes from 40psi to bout 7 psi.... is it my injectors, tune, or pump? could this be the cause of my random misfire code that keeps popping up?

when motor built 24 lb injectors were put in... motor is a 4.6 stroked to a 302 at 9.2:1 compression, stage 2 cams and heads, trickflow intake, headers, cai, bolt ons... making bout 315rwhp and 316rwtq...
 

mogs01gt

Founding Member
Jul 22, 2002
3,113
30
119
Ohio
Jul 9, 2008
#2
  • Jul 9, 2008
  • #2
I would recommend a new pump. The Focus pump should help out but I dont see why its dropping down to 7psi, that leads me to believe there are other issues going on.
 

Stark77

Member
Jun 11, 2008
501
0
16
Tallahassee, FL
Jul 9, 2008
#3
  • Jul 9, 2008
  • #3
with Stage 2 cams and stage 2 heads you're running a stock fuel pump and only 24lb injectors?
 

Stan Weiss

Member
Dec 8, 2006
347
2
16
Philadelphia, PA
Jul 9, 2008
#4
  • Jul 9, 2008
  • #4
24lb injectors should be good for 365 HP at 95% duty cycle and .5 BSFC
 
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