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  • SN95 4.6L Mustang Tech

98 gt fuel pressure issues

  • Thread starter Thread starter chasecollier1984
  • Start date Start date Jun 2, 2026
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chasecollier1984

New Member
Jun 2, 2026
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KY
Jun 2, 2026
#1
  • Jun 2, 2026
  • #1
Hey all new to the group here!!! I have a 98 GT 4.6 5 speed with quite a few bolt ons and a livewire ts+ tuner. I just installed a firewall mounted fpr and a oe replacement fuel pump from auto zone. Shortly after installing the pump my car started cutting out around 3000rpm once it warms up. I can shut the key off and start it back up and it runs great for a couple mins until it loses the prime from the system. I have my fuel pressure set at 38psi on the regulator and when it starts acting up I can watch the pressure drop to around 20 to 25 max psi at wot. I also replaced the ccrm from a low mileage one from a salvage yard. I didn't have these issues until I replaced the pump. Any help I can get on this issue will be greatly appreciated and happy motoring guys and girls...
 
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