The car stalls on gas: when switching to gas, when slowing down - all the reasons and ways to solve the problem
Content
If the car stalls when switching to gas, it is necessary to check the tightness of the HBO. Sometimes the gearbox membrane coarsens, then the car engine can shoot, triple and even stall. The problem is solved by replacing worn-out devices.
The low price of gas fuel contributes to the popularity of LPG vehicles. The modern generation of equipment allows the use of gasoline and methane in one car. A common problem with this fuel usage pattern is that when switching to gas, the car stalls.
The main reasons and features of the repair
Any improvement makes a significant change in the design and operation of the car. The installation of gas-balloon equipment, even by experienced auto mechanics, can lead to a malfunction. Runs on petrol, but on gas the car dies.
Common causes of HBO breakdown:
- Stopping the engine after a short period of idling.
- When switching to gas, a car with LPG 4 stalls at the moment of switching from gasoline.
- Carbon deposits in the injectors and dirty filters reduce the characteristics of the fuel mixture.
- Due to a malfunction in the gearbox, a machine with the 4th generation of HBO stalls when switching to gas.
- Methane fuel may contain condensate, especially during the cold season, so the car will not start.
- The loss of tightness of the equipment connections leads to air leakage, and the machine stalls when switching to gas.
- Malfunction of the fuel supply solenoid valve - occurs due to tar deposits.
The car stalls on gas: reasons
In order not to have problems with starting and moving off the car, when switching from gasoline to gas, diagnostics and tuning of the car systems are required.
HBO stalls at idle
When switching to methane, the engine stops or runs for a short time. There are several reasons for the malfunction, but the most common is poor heating of the gearbox. This is a consequence of the improper organization of the heat exchange system from the throttle. It is necessary to connect the stove to heating with nozzles of sufficient diameter.
Also, a malfunction may occur due to unadjusted idling. This problem is eliminated by rotating the reducer screw, releasing the supply pressure.
Car stalls when switching to gas
Sometimes in cars with fourth-generation LPG, the engine twitches and stops when it switches to methane. Malfunctions that occur while driving are the same as when idling. Pressing and releasing the brake while in gear will stop the engine. When switching to gas, a car with LPG 4 stalls due to poor heating of the gearbox or high pressure in the fuel system.
It is necessary to transfer heat to the device from the stove, and regulate the pressure of the cooler.
Checking the tightness of HBO
If the car stalls when switching to gas, it is necessary to check the tightness of the HBO. Sometimes the gearbox membrane coarsens, then the car engine can shoot, triple and even stall. The problem is solved by replacing worn-out devices.
Clogged nozzles and filters
Natural gas motor fuel contains minor impurities of complex hydrocarbons that cause soot. Therefore, when operating a car with an injector or carburetor, plaque accumulates, and the car stalls on gas. These substances reduce clearances and affect the fuel supply to the injectors.
When switching to gas, a 4th generation HBO car also stalls with clogged filters. To restore the normal operation of the engine without jerking, it is necessary to remove carbon deposits from the injectors. Replace clogged fine and coarse gas filters.
Reducer failure
When switching to gas, a machine with the 4th generation of HBO stalls also due to malfunctions in the supply of methane. Usually, the membrane fails during prolonged use.
The device can be repaired by yourself. It is necessary to remove the gas filter, disassemble and clean the gearbox from contamination.
Gear diaphragm
Pull out and replace the old membrane, assemble the device in reverse order.
Other factors can affect the operation of the gearbox - high pressure in the system, poor warm-up and poor fuel quality. The device can be adjusted with a special screw. And the gearbox heating system must keep the hot operating temperature at least 80 degrees.
Condensate in gas mixture
Methane fuel contains water vapor, which can cause starting problems. Sometimes the car stalls on gas when you let off the gas. In the cold season, condensate may accumulate in the vehicle's HBO system. In winter, water freezes and reduces the clearance in the pipes and gearbox. The injectors do not open due to condensation and the car may stall when braking and even when driving at speed. The engine reduces power, pulls the car jerkily.
Condensate in the HBO system of the car
To eliminate the breakdown, you need to warm up the car well at low speeds. Unscrew the reducer plug and drain the water from the HBO system. Assemble the device in reverse order. It is better to refuel at proven gas stations.
Violation of the tightness of HBO, air leaks
During operation, the gas transport system may wear out. Microcracks and leaks in the pipe connections appear. Air degrades the properties of the combustible mixture. When the clutch pedal is depressed and the gas is sharp, the engine is running. But if the load is released or switched to neutral, the car stalls.
Solenoid valve failure
A problem when switching from gasoline to methane may arise with the gas supply device. Long-term operation leads to the accumulation of deposits on the working surface of the HBO system. Resin deposits in the solenoid valve can lead to sticking in case of poor warm-up.
HBO solenoid valve
To eliminate the malfunction, it is necessary to close the gearbox and produce methane from the fuel system. Unscrew the valve and completely remove the carbon deposits with a solvent. Next, assemble the device, start and check the operation of the engine at idle.
How to avoid problems
In order to avoid car breakdowns, it is necessary to follow the rules for the installation and operation of HBO 4th generation. And if a malfunction occurs, check all possible causes.
Ways to prevent breakage:
- Allow the gearbox to warm up to operating temperature.
- Clean nozzles from carbon deposits, change filters during maintenance.
- Refuel with high quality fuel.
- Maintain the condition of the gearbox parts.
- Adjust idle, relieve high pressure.
More serious problems are best solved in a car service equipped for LPG repair.
