Low fuel rail pressure on 03 duramax - 2004 Chevrolet Silverado 2500HD

5 Related Answers

Anonymous

126 Answers
Posted on Jun 30, 2008

SOURCE: 2004 lly duramax

try hooking up a fuel pressure test gauge to fuel rail pre filter and post filter and rev truck to 2500 rpm what is fuel pressure ?
next using a vacume pump attach to fuel pressure regulator pump up while engine is running only pump up to 8 psi to see if pressure changes if not replace pressure regulator .
it could also be ur speed sensor switch on overdrive transmission
good luck with it

Anonymous

607 Answers
Posted on Apr 27, 2009

SOURCE: low fuel rail pressure

Check your " FUEL FILTER " for clogging. Work backwards toward the fuel supply tank, Hope this helps.

Anonymous

245 Answers
Posted on Apr 29, 2009

SOURCE: low fuel rail pressure

who did a conversion on this truck???? the duramax is a common rail engine and can not handle wvo or sve. it will destroy your entire fuel system in no time on this truck. if you want to do a vo conversion you need to get a diesel with an inline injection pump or one of the older powerstrokes. i would suggest you quit trying to run wvo through this truck if you do not want to do a lot of very expensive damage

Rob Sinbad

709 Answers
Posted on Oct 04, 2009

SOURCE: Low pressure at the fule rail, changed out the

if you getting low fuel pressure after changing out the fuel filter and the pressure regulator, than the fuel pump may not pump correct amount of pressure. being 1993, the pump has age along and have run many miles, may have gotten weak and not pumping correct mount of psi.

Anonymous

71 Answers
Posted on Apr 05, 2011

SOURCE: 2005 Lincoln Town Car suffering from low fuel

The ford spec listed in the ford engine control manual is:

General Specifications Item Specification Fuel tank capacity 71.9L (19 gal) Fuel Pressure Hot restart 448-482 kPa (65-70 psi) Key ON Engine OFF (KOEO) 140-415 kPa (20-60 psi) Key ON Engine Running (KOER) 170-280 kPa (25-40 psi)

Are you measuring the fuel pressure with a mechanical gauge or are you using a scan tool . If with a mechanical gauge, does the gauge have an air purge? What symptoms does the vehicle present. If running rough you could have a fuel injector leaking. Are you measuring the fuel pressure with the key on engine off? If so, did you cycle the key a few times? Good luck

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2007 silverado duramax shows low rail presure only at idle

chevy 1500 or 2500 or 3500
what engine size .(gas) 6.6Liter????Diesel it is. (
P0087
DTC P0087: Fuel Rail Pressure (FRP) Too Low
The actual FRP is less than 22.5 MPa (3,263 psi).
line above pasted from SM
gasoline put into fuel tank (step 1 in the diag page i pasted here

When ambient temperatures are below 0°C (32°F), the fuel tank pickup screen may be iced over from water in the fuel tank.
When power enhancing devices have been attached to the fuel rail pressure sensor circuits, this DTC may set and adversely effect the fuel system components. (means hack/mods done)
If the fuel pressure valve is not torqued correctly, the valve will leak fuel into the fuel return system causing this DTC to set. The fuel pressure relief valve uses a bite type seal, and proper torque is essential for valve to rail sealing. Refer to Fastener Tightening Specifications.
A sticking FRP regulator may cause this DTC to set.
High fuel injector return flow may cause this DTC to set.
The addition of fuel system enhancements, such as auxiliary fuel tanks or add on fuel filters may relate to driveability complaints.

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Apr 27, 2009 • 2003 Chevrolet Silverado 2500HD

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