06 LBZ CCSB A few bolt on's! Posted on Nov 02, 2008 It also causes black exhaust and high emissions (HC's). November 24th, 2009 #2. bballer182. the fuel pressure regulator is on the end of the fuel rail it is held on by a torx screw relieve the fuel pressure using the schrader valve on the fuel rail remove regulator holding screw and replace new regulator be carful not to damage o-rings on new regulator. What I am showing you is the proper way to clean the fuel system of your vehicle. If you need... 3. FRP_C is actual rail pressure '07 TBSS, LS2, T42, 3SS, Black on Black on Black, Pretty much stock at the moment. 1. Some returnless fuel pressure systems use a fuel pump driver module or fuel pump control unit. A valve controls this pressure; if the sensor ever fails, you should replace it. Under the lid of the fuse box, you may find a description and identification of every fuse in that panel. The fuel pressure regulator, as the name signifies, regulates the pressure of fuel delivered to the engine. I noticed when data logging fuel rail pressure (actual and desired) at certain points the pressure reading jumps from 18000 psi to ~62000. These excessive hydrocarbons overheat and damage the catalytic converter. 4. 2. High fuel pressure results in a rich air-fuel ratio because the increase in pressure forces more fuel through the injectors than required. There is no need to resatore the pressure on a fuel injected gas engine.Take a test light from the gray wire to the black wire at the pump connector and crank the engine.If it lights up you need a pump.I suggest changing the wiring harness as well to avoid a repeat failure. The AFRP button is "x" out on scan tool? Failed Fuel Pressure Regulator . How to restore actual fuel rail pressure button? 1. This is a pulse width modulated signal that is sent to the fuel pump from the fuel pump driver module and engine computer to control the speed of the fuel pump which in turn will control the fuel pressure.
You do not need to be a trained mechanic to tell if it is indeed the problem or if you have to keep on looking for any other part of the car that can be seen as the culprit!
By reading manifold pressure or vacuum, the regulator will keep the fuel pressure constant regardless of how much fuel is being drawn from the pressurized system.
Use a fuel pressure gauge to test fuel pressure.
In fuel-injected and diesel engines, fuel rail pressure sensors monitor the pressure in the fuel rail and report the reading to the engine control module. Connect the fuel pressure gauge to the fuel system as you did in the previous section.
Misfires and a decrease in power, acceleration, and fuel efficiency. The fuel pressure regulator relies on vacuum pressure generated by the engine to help maintain system pressure and predict what fuel demands are about to be placed on the fuel injection system. If you are interested to know the bad fuel pressure regulator symptoms, keep on reading and learn from some of the insights I will be sharing. Your car owner's manual or vehicle service manual will tell you where to find the fuse, but look in the "power distribution center" under the hood, or in a fuse panel under the dashboard.
This will, in turn, cause the engine to run poorly, thereby degrading the engine's performance. You have to know how to check fuel pressure because it drops when the pump is weak, signaling that you need to take immediate action. That system, especially on fuel-injectede models, operates under high pressure and remains like that even when you shut off the engine. The higher the pulse width signal, the higher the fuel pressure. SOURCE: how to replace a fuel pressure regulator. It says not a valid PID? Different vehicle manufacturers have devised several methods of relieving fuel pressure. This matches the corresponding desired fuel pressue. If any drop in pressure is detected, the engine control module compensates so that the fuel pump can restore the proper pressure. To relieve system pressure, loosen the fuel filler cap and remove the pump fuse or relay. If I'm not mistaken the max for the Duramax is around 23000-24000 psi. It … All of this occurs when accelerating. Anybody have any ideas? Usually a faulty fuel pressure regulator will produce a few symptoms that will alert the driver of a potential issue.
The vehicle in this video is a 1998 Saturn SL2 with a 1.9L DOHC engine.
One of the first symptoms of a possible issue with the fuel pressure regulator is engine performance issues. Have an assistant start the engine, let it idle for a minute, and then turn it off.
The switch is designed to trip and cut power to the fuel pump in the event of a collision, but you can also trigger it by hitting a large bump or pothole as well.
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