When to replace the fuel pump check valve?
A fuel pressure gauge can be used to test the amount of fuel pressure when the vehicle is running. If the amount of pressure is lower than the specifications for your car, the check valve may need to be replaced.
What should the fuel filter restriction be on a Dmax?
Lines can pinch, get blocked etc. To test, use our Fuel Filter Restriction Gauge which is a tool that every Dmax owner should carry along on the road. Supply side restriction runs normally in the 2-4” hg range on this gauge. If it is any higher than 4”hg start with a fresh filter.
Where is the pressure regulator on a fuel pump?
While some fuel pressure regulators are built into the fuel pump assembly, most fuel pressure regulators are mounted in the fuel rail and can be serviced independently of the rest of the system.
What’s the low fuel pressure code on a Duramax?
Duramax LBZ and LMM P0087 Low Fuel Pressure code Summer comes, temps rise, and the working trucks with relatively high miles start to set a P0087 code and go into limp mode while towing. I am on the receiving end of continuous calls over the past few years inquiring what to do.
Can a fuel pressure regulator leak into the vacuum hose?
Presence of Fuel in the Car’s Vacuum Hose. One of the fuel pressure regulator symptoms that one should never ignore is the presence of fuel in the vehicle’s vacuum hose. This is an automotive component that connects to one side of the fuel pressure regulator. If there is a problem with the regulator, fuel can leak into the vacuum hose.
When to change the fuel filter on a Duramax?
Dirty fuel filter is the most common issue we see when fuel rail pressure is low. The filter should be changed in the 8,000-10,000 mile range if good fuel is being purchased and running mostly low HP tuning, much sooner if running competition/race style tuning.
When to change fuel filter when fuel pressure is low?
Dirty fuel filter is the most common issue we see when fuel rail pressure is low. The filter should be changed in the 8,000-10,000 mile range if good fuel is being purchased and running mostly low HP tuning, much sooner if running competition/race style tuning. When in doubt, change the filter!
Can a failed fuel pump cause a failed pressure regulator?
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