If you are a diesel car owner, filling your tank with gasoline is one of your biggest fears. Sometimes this is an honest mistake. A simple idea. Other times, a family member or friend borrowed your truck and filled it up by mistake by 87. No matter what the cause of the pollution is, it can bring disaster to the diesel injection system-and this honest error only takes a few seconds and costs you thousands of dollars. Often referred to as misfuelling, this is an accident that approximately one in seven people has experienced in their lifetime, whether it is gasoline plus diesel or diesel plus gasoline.
This relatively high percentage of misfuelling is sufficient to explain what happens when it happens. And because gasoline in diesel is more destructive than gasoline in diesel, we discuss the former here. There are different levels of alarms, depending on the following factors: 1) how much gasoline you have added, 2) the amount of diesel still in the tank before refueling, 3) whether to start the engine, 4) if you drive the vehicle long enough To notice the engine problem, and 5) If you keep running the engine until it stops running.
Although the occasional confusion of the pump cannot be eliminated, if you grab it fast enough, you can avoid the nightmare damage it can cause. Below, we will outline the standard operating procedures for correcting this situation after the act is completed.
Before delving into the impact of gasoline on the components in a diesel injection system, it is important to remember that gas is basically a solvent, while diesel is an oil-based fuel that, in addition to being combustible, is also used as a lubricant. When gas is introduced into the diesel fuel system, lack of gasoline lubrication is responsible for most of the internal damage that occurs in the injection pump and injector. Of course, the chemical composition of gasoline is also very different, which can cause (among other things) improper atomization of diesel engines. It should be noted that, in most cases, diesel engines that use gasoline are more destructive than gasoline engines that use diesel. Most of the carnage occurred in the injection system, and the cost of the injection system can be as high as $10,000 on today's high-priced diesel engines. (Swallowing.)
It is more common to add gasoline to diesel vehicles than to add diesel to gas burners. but why? For starters, a typical air pump nozzle will fit exactly at the refueling port of a diesel engine, while most diesel nozzles are not suitable (or effortless) for the refueling point of a gasoline vehicle due to their large diameter. Second, most US gas stations are mainly composed of air pumps, so the chance of seizing the gasoline nozzle is higher than the chance of distributing diesel. The third catalyst for incorrect refueling is that some gas stations use nozzles of different colors, such as yellow or black. We prefer the arrangement shown above: diesel is green and natural gas is red, and (like most commercial gas stations) both have clear labels.
The most inevitable part of incorrect refueling is the drop of the fuel tank. Whether you have started the engine or not, you must empty and clean the engine. Simply sucking out "most" of gasoline and topping it up with fresh No. 2 gasoline is not enough-the expensive injection systems that are equipped with today's diesel engines are not enough. For most trucks, this means removing the anti-skid plates, fuel tank straps, disconnecting all fuel lines from the chassis to the fuel tank, lowering it and pulling the transmitter. In the best case, you will realize what you are going to do before you start refueling, but if you figure it out after pumping the water but before the ignition, it will not cause any harm. If the lift pump has not started (if equipped) and the engine has not started, the extent of your problem is isolated in the tank. Drag yourself home or deliver to your favorite store for between 400 and 800 dollars.
On older diesel engines, the process of emptying the tank, flushing the lines, and restarting with fresh diesel will correct this situation in nine out of ten. Older diesel engines refer to engines that use lower injection pressures and looser tolerances-mainly those with a front common rail fuel system. Full disclosure: We have seen a simple drain pipe and a fuel tank cleaning job on the LB7 Duramax ('01-'04 common rail system), the system is filled with gasoline, but its owner wisely shut down the truck first Started to stutter. Please note that if a distributor or independent store is discharging a gasoline-diesel mixture, a high per-gallon processing fee may be charged.
Once removed from the fuel tank, the lift pump of the diesel engine is the first component to face gasoline intrusion (except for the '01-'16 Duramax engine, which has no chassis, engine or lift pump in the tank). As long as it is not exposed to the gas for a long time, the lift pump can usually be kept. However, you should consider replacing it to ensure ultimate peace of mind, especially if your fueling error causes catastrophic failure of the jet pump.
The low-pressure fuel supply lines from the fuel tank to the lift pump and from the lift pump to the engine usually do not need to be replaced. In most cases, these are hard wires that will not decompose or corrode at an accelerated rate after contact with gasoline. However, the pipeline should be flushed thoroughly with brake cleaner and compressed air.
It goes without saying that the fuel filter is always replaced after refueling by mistake, but what about the fuel filter reservoir? Due to its internal ports and channels, some independent stores and distributors prefer to start with a new filter housing. If you choose to start over at 100%, this is a small increase to your total cost. If you do this in the driveway of your home, it may be fine to remove it and clean it thoroughly.
In addition to fuel injectors, diesel injection pumps will be the most difficult to handle gasoline. As far as the new common rail engine is concerned, the Bosch CP3 used in the '01-'10 Duramax engine and the '03-'18 Cummins mill is a high-pressure pump with strict tolerances, but can be slightly exposed to gasoline (nothing Long-term). However, for trucks equipped with Bosch CP4.2 ('11-present Power Stroke, '11-'16 Duramax and '19 Cummins), we recommend replacing it whenever you see gasoline. When there is aeration, debris, or lack of lubrication, it can easily self-destruct (especially in Duramax applications), and you never want to risk leaving this pump undamaged after being injected with gasoline.
Depending on the severity of the wrong fuel, the fuel rail can be cleaned or completely replaced. To be sure, most car owners choose to clean, but it is important to realize that it is difficult to determine the cleanliness of each internal channel in the fuel rail, especially when the candidate you are dealing with has metal debris passing through. It is common for dealers and independent maintenance agencies to recommend a complete replacement.
In addition to the fuel injection pump, you should pay special attention to checking the fuel injectors after seeing gasoline, especially those that work in high-pressure common rail engines. In common rail applications, injectors have a lot of work to do, with many precision internal moving parts, ultra-strict tolerances, and quite expensive price tags, so make sure they get a healthy list (if you don’t, Then replace them)'t) should be high in your priority list. If you repair it yourself, it is worth sending the injector for testing. They may work fine today, but over time, they may show signs of wear (fogging at idling speed, abnormal balance rate, etc.) or completely fail due to gasoline encounters. In our opinion, the risk is not worth it. The inner peace is.
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