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why Fuel whooas

  • Thread starter Thread starter Mustangr
  • Start date Start date Feb 22, 2009

Mustangr

Founding Member
Nov 3, 1999
217
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0
boise Id
Feb 22, 2009
#1
  • Feb 22, 2009
  • #1
Just had it dyno tuned was running great and now..... Just coming into power band boost starts to increase then it starts holding back. I see fuel pressure fall off completly. If I stay in the throttle it backfires it surges badly.
what gives internal pump maybe T-rex filter Hmmm
 

millhouse

Founding Member
May 14, 2002
1,985
0
46
Simpsonville, SC
Feb 24, 2009
#2
  • Feb 24, 2009
  • #2
Mustangr said:
Just had it dyno tuned was running great and now..... Just coming into power band boost starts to increase then it starts holding back. I see fuel pressure fall off completly. If I stay in the throttle it backfires it surges badly.
what gives internal pump maybe T-rex filter Hmmm
Click to expand...

Any drop in fuel pressure would typically indicate a problem with either the pumps or the filter. Either pumps would be adequate for your power levels by themselves…..so I would first look into replacing the fuel filter.

What is your base pressure set at? What fuel pressure regulator are you running?
 

Mustangr

Founding Member
Nov 3, 1999
217
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boise Id
Mar 1, 2009
#3
  • Mar 1, 2009
  • #3
I found a couple problems. Open Vacum and a kink in return fuel line. Opps
 

Black1987Stang

Active Member
Aug 22, 2004
1,422
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37
Jersey Shore
Mar 14, 2009
#4
  • Mar 14, 2009
  • #4
So all is good now? what was wrong?
 

Mustangr

Founding Member
Nov 3, 1999
217
0
0
boise Id
Mar 15, 2009
#5
  • Mar 15, 2009
  • #5
I dont know. Now the brand new MSD distributor that I got with the Accel DFI kit is now faulty..I had to return it to MSD. We will see. I want to get the
Stealth kit from Aeromotive. Has anyone had problems or info about it.
 
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