Fuel injection pump assembly; D. Due to the direct fuel injection process, there is no need to regulate, or throttle, incoming air. There are in fact two pumps in this assembly, a low pressure supply pump and a high pressure fuel injection pump. One of the problems that plagued early injectors was a ball-seat leak. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Traditional diesel fuel injection systems used a distributor pump that delivers high-pressure fuel to a simple spring-seat injector at the right time for injection.
This sensor must not be confused with the pressure regulator, which opens and closes in response to varying pressures to maintain the specified fuel pressure. Getting a batch of bad fuel is extraordinarily rare when you refuel at higher-volume fuel stations. So please help me… Seems to me the fuel pressure is bleeding down after the engine is shut down, which is why it only sets the code after sitting overnight. The pressure between the filter and the rail will be lower than normal or absent because the filter might not allow a reverse flow. The fuel pickup and sender module is located in the middle of the fuel tank and is accessed from the top. Cost for parts and labor will vary depending on model and year.
The solution is to repair the wiring and to relocate it so that it does not rub on the fender liner. If the engine is shut down the moment any of these symptoms start to occur, there is a chance that most or all of the injectors can be recovered by simply purging the fuel system and replacing the fuel filter. Once they fill up, they practically block all fuel flow. Pilot injection, a new injection strategy that will be discussed in further detail later, was also introduced. Fuel tank capacity is effectively increased from the 36 gallons provided in the long-box tank to 50 gallons divided over the duel tank setup.
Fuel rail pressure sensor; G. If you pick up bad fuel somewhere, especially if your fuel filter has been on for longer than the specified fuel filter replacement interval, water contamination can be drawn through the filter before it has had a chance to coalesce at the bottom of the filter housing and turn the water-in-fuel light on. Need help with a P0087 code? This is also an expensive, time consuming job so I recommend having a qualified mechanic diagnosis the problem if you are at this point. There are six or seven holes distributed radially in the nozzle and each hole that I measured with a magnifier and graduated gauge is roughly three-thousandths of an inch in diameter. It would be a good idea to check the fuel rail first, although it's less likely to be the problem if you do find a leak, it would tend to eliminate the other conditions. If the fuel pump is failing or the fuel filter becomes completely clogged, this may cause the engine to die while driving resulting in serious issues for the driver. Where Do We Go From Here? In a future article, I will look in more detail at the brains of the operation — the Engine Control Module, sensors and control of the fuel system.
Fuel contamination issues can be manifest by a rough-running engine, white or grey smoke, or fuel knock. White smoke ususally indidactive of not enough fuel, but not always, but would fit here. They receive a constant supply of high-pressure diesel fuel from the fuel rails and piping. We see this start to rear its ugly head at an average of 175,000 miles depending on the history of the vehicle. Fuel transfer from the tank is handled by a supply pump contained within the injection pump assembly.
P0088 can be a serious code but one that is not seen very commonly. A quality lift pump from Airdogliftpumps. Keep your fuel filters clean and fresh, invest in a lift pump, keep a Race Fuel Valve handy, and purchase fuel at reputable sources to keep yourself from being stranded on the side of the road with low rail pressure issues. Because of the extreme pressures and the high rate of injection through micro-sized nozzles, fuel atomization is dramatically improved over older diesel injection systems. Rarely, the fuel pump plunger was affected, requiring replacement of the fuel pump. I deleted the codes and than had Cyd 1,3 and 8.
Fuel delivery from these injectors more resembles a fog than the stream of fuel that older injectors provided. Repair all wiring found to be defective. Also be sure to check that the fuel filter is correctly installed. Defective pressure sensors can deactivate the fuel pump on some applications, so be sure to check the operation of this sensor in conjunction with the actual fuel pressure if the vehicle can start. If you think fuel might be an issue, check fuel pressure.
The high pressure portion of the pump is a radial three-piston, cam operated unit that requires about one-ninth of the operational torque of the conventional distributor-style injection pump common to the 6. If the engine does not start, refer to Engine Cranks But Does Not Run. Step 4 If the pressure regulator is located on the fuel rail, it is likely to be spring operated, but supplied with vacuum assistance. To make such injection possible, particularly when injecting at the end of compression or during the power stroke, high pressure is required, and the typical high-pressure fuel injection system usually runs from 200 psi to over 3,000 psi, whereas common port fuel-injection systems usually run between just 10 psi and 65 psi. The check ball that released fuel above the piston would leak fuel between the ball and seat, causing the injector to leak far more fuel to the fuel return than if it was normally seated. Possible Causes The most common cause of this error code is clogged filter or fuel screen. Here are some of the most common.