Upgrades and Aftermarket - 99 & up 7.3L EngineUpgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
I have a magnafuel fpr 9925 installed on my truck with a isspro ev2 gauge on it. I can't seem to get this up to 55-65 lbs. I have tried to adjust it but it doesn't seem to move higher. Any ideas on why this is happening with an adjustable fpr?
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1999 F-350 Dually Diesel 7.3L DI, 201*, Harpoon & Hutch Mod
Akron, OH (45 min South of Cleveland)
What kind of test? Or are you saying blocking the return line is the test?
I believe that is what he is saying. Blocking the return line and you will see if the fuel pump is capable of going higher than your current readings. Could be trash in the FPR or weak spring.
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2001 F350 7.3 4x4 CC SRW/ Aeroforce Interceptor/ BD Thruster II/ Bellowed Up-Pipes/ 4" turbo back straight exhaust / CCV Mod /DIY 6637/ TS chip reburned with PHP tunes (Stock, 40 Tow WITH Whsiper tune, 80 Daily Driver, 100 Race, 140 Extreme, 140 smoke show)//Recon smoked cab lights/MM Hubs/Hood/HPx/FRx/GPR switch-Indicator
First vehicle (still driving): 96 F250 XLT 2x4- All factory (injectors & turbo) except straight exhaust. 570k miles
Last edited by rammertide07; 01-26-2013 at 01:44 PM.
I have the return line Tee'd into the fuel line behind the pump. I originally blocked the return line at the start of the FPR and the pressure dropped to 30. I then blocked it below the FPR and the part where it Tee's into the fuel line before the pump. The pressure rose, but held at 45ish.
Does that indicated the fuel pump is done or should I do something else to be sure?
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1999 F-350 Dually Diesel 7.3L DI, 201*, Harpoon & Hutch Mod
Akron, OH (45 min South of Cleveland)
I used an adjustable raptor pump that I had lying around and I noticed on the electric pressure gauge that the gauge immediately shot up to 55 psi. The stock pump I had on it incrementally rises to the above stated 45-50 psi. Is that another tell-tale sign the pump is bad?
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1999 F-350 Dually Diesel 7.3L DI, 201*, Harpoon & Hutch Mod
Akron, OH (45 min South of Cleveland)
The tank is half full. Unless it is drawing air from the lines, but I vacuum tested them all when I installed them. It isn't air from the tank. I purchased a new Bosch for 84$ shipped.
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1999 F-350 Dually Diesel 7.3L DI, 201*, Harpoon & Hutch Mod
Akron, OH (45 min South of Cleveland)
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