What is aftertreatment fuel pressure?
The DEF Pump creates hydraulic pressure to transfer the DEF from the tank to the injector. The Aftertreatment Fuel Pressure Sensor monitors the pressure created by the pump.
What is an ahi module?
What does an AHI module do? The AHI module’s purpose is to regulate and control the amount of fuel that goes to the 7th injector during the DPF regeneration process. The AHI module has a low-pressure fuel and high-pressure fuel that is controlled by the internals of the AHI module.
What is a 7th injector?
The 7th injector injects extra fuel (under boost only) into the intake air charge prior to the supercharger. It is just a cheap way to get more fuel into the engine. It’s one injector as opposed to replacing all six injectors for proper sized units.
What does AHI stand for?
The Apnea Hypopnea Index (AHI) and oxygen desaturation levels are used to indicate the severity of obstructive sleep apnea.
What’s the after treatment fuel pressure on a mower?
That one had an after treatment fuel pressure of 90 psi when the shutoff valve opens, then dropped to zero with the valve closed. Mine stays at about 45 with the valve closed.
Where is the after treatment fuel pressure pump?
When activated it boosts engine fuel psi to 90ish to help atomize fuel at the nozzel. 2007 emission non-catylized engines have the same pump but they are mounted inside the right frame rail mid-chassis. Mine does not have the separate pump for after treatment, but I found the problem.
What happens if you have low fuel pressure?
Today’s electronic cars have a fuel pressure sensor that intelligently calculates if anything is going wrong. If it is, the sensor triggers the check engine light prompting you to get your fuel system checked. Generally, with such a problem you will get a P0190 code accompanying your problem.
Can a low pressure fuel system cause spark plugs to wear out?
A low-pressure fuel system will destroy the spark plugs that ignite the fuel in an engine’s cylinder. If by chance you are replacing them and you find they are worn out before their time, you might be looking at a problem with your fuel system.