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Because gas vehicle emissions clean, price economy, many vehicles are modified into gasoline, natural gas dual fuel car, along with the increase of vehicle mileage. There's gas car trouble vary in size. Common gas car trouble have switch contact undesirable and the gas is difficult to start, such as indicator lights to gas instructions.
1.1 gas vehicle fault a
1.1.1 gas vehicle fault phenomena
Vehicle gas car trouble phenomenon for cold and hot car in its difficulties or startup starter did not respond.
1.1.2 gas vehicle troubleshooting steps and elimination method
1.1.2.1 according to gas car trouble phenomenon gradually will find fault source gas vehicles. First check the amount of oil tank, check whether enough fuel.
1.1.2.2 check whether oil pump, such as pumps don't work inspection circuit of: oil pump power if there is electricity, if there is electricity is sure pump damage; Don't have electricity and check the oil pump insurance, oil pump relays for damage, such as damage replace the oil pump insurance or oil pump relay.
1.1.2.3 check engine fuel gas car dashboard engine is put on your hazards twinkling. If flash vehicle engines have proved gas car trouble to car repair shop for repair detection, using the computer gas car trouble detector detect gas vehicle fault reason and gas car trouble shooting.
1.1.2.4 check gas part control computer work is normal, spray rail hose is caused by the intake manifold seal leakage emergence lax, such as the control computer gas car trouble cause nozzle injection lead to start difficult not to replace or repair control the computer.
1.1.2.5 check the battery power and starter: if the battery power is not enough maintenance charging or replace; And battery power check whether there is enough starter gas car trouble, such as the starter work is bad, the starter to carry out the maintenance or replacement.
1.1.3 cause gas vehicle of the cause of the failure
1.1.3.1 oil pump work bad: long-term lack of oil tank, oil pump long-term cooling pump damage or not to bad work fuel pressure insufficient. Oil pump gas lines auto fault: the have a short circuit, take a iron causes insurance piece of burned. The oil pump relay auto fault caused by oil pump gas to power pump doesn't work properly.
1.1.3.2 engine gas car trouble: the engine parts caused by damage to the gas car engine aging fault, start difficult.
1.1.3.3 battery and starter gas car trouble: don't maintain long-term damage caused by battery voltage insufficient
1.1.3.4 gas component gas car trouble: gas parts quality problem or improper installation hose, burst damage leakage.
1.2 gas car trouble two
1.2.1 gas vehicle fault phenomena
Vehicles high gas consumption.
1.2.2 gas vehicle troubleshooting steps and elimination method
1.2.2.1 first check gas pipeline, the joint for leaks. Such as check gas leak out maintenance car trouble.
1.2.2.2 check gas gush rail and control computer work is normal or not, such as work caused by poor engine work is not even high gas consumption, repair or replacement gas gush rail or control the computer.
1.2.2.3 check engine condition found work the symptom such as bad engine overhaul.
1.2.2.4 check gas reduced pressure system is functioning properly, the fuel gas pressure adjustment is appropriate, such as pressure adjustment not too high or low all can cause the engine to bad lead to high gas consumption.
1.2.2.5 check gas nozzle aperture is too large, cause too much can't complete combustion engine intake and lead to high gas consumption, replace the fuel gas nozzle.
1.2.3 gas vehicle breakdown reason
1.2.3.1 leak: gas hose quality problem or package installation problems-high pressure pipe and engine body friction between a bit loose, support by high pressure tube connects to a flat head loose.
1.2.3.2 spray rail, computer gas car trouble: gas parts quality problems caused by poor engine work work is not even, power degradation caused by high gas consumption.
1.2.3.3 reduced pressure device gas car trouble: pressure-relief device internal gas vehicle fault or gas pressure adjustment improper engine work is bad, the high gas consumption.
Gas gas car trouble. Nozzle: gas engine power nozzle aperture and needed not match, the subsystem caused by excessive high gas consumption.
1.3 gas car trouble three
1.3.1 gas vehicle fault phenomena
Idle instability, accelerate poorly
1.3.2 gas vehicle troubleshooting steps and elimination method
1.3.2.1 check gas computer, spray rail and pressure reducing valve is functioning properly, the fuel gas pressure adjustment is justified or not, through the check will work bad parts repair, adjust or change. (detection method of detection with gas pressure gauge is the test of fuel gas pressure of work for normal 0.05-0.06 MPa).
1.3.2.2 check gas gush rail hose off, damage or whether the leak caused by a ruptured the engine work is bad, the acceleration not free.
1.3.2.3 overhaul engine: check the engine is normal or not, whether valve clearance adjustment to the small valve closes lax caused by lack of cylinder engine or throttle gas vehicle fault (throttle dirty or internal sensor gas vehicle fault caused by engine computer can't clear recognition of the throttle valve opening cause acceleration not free, cleaning throttle or the maintenance and replacement throttle)
1.3.3 gas vehicle breakdown reason
1.3.3.1 gas computer, spray rail and pressure reducing valve gas car trouble: gas computer, spray rail and pressure reducing valve parts quality problem didn't work properly or use undeserved, artificial damage caused by such as gas suite can not work normally cause the engine to bad idle instability or accelerated poorly.
1.3.3.2 spray rail hose gas vehicle fault: hose quality problem or improper installation hose damage caused by the rupture, joint emerge individual cylinder engine work bad leading to engine idling instability, accelerate poorly.
1.3.3.3 engine gas car trouble: individual parts damaged, dirty or long time don't caused by poor maintenance work, cause the engine idling instability, speed up the phenomenon such as not free.
1.4 gas car trouble four
1.4.1 gas vehicle fault phenomena
Engine can start, but after the launch of spirit or not remove transformation conversion
1.4.2 gas vehicle troubleshooting steps and elimination method
1.4.2.1 check gas pressure gauge, ChuQiPing check whether any natural gas, if there is no pressure cylinder in natural gas has no proof or not enough to supply engine combustion.
1.4.2.2 check gas computer, spray rail and pressure reducing valve is functioning properly, found gas vehicle maintenance or replacement gas suite.
1.4.2.3 transfer switch gas car trouble: check the gas converted, found that switch in bright lights or inaccurate maintenance or replacement gas transfer switch.
1.4.2.4 check the temperature sensor: check the temperature sensor thrum plug-and-socket if there's any loose, fall off phenomenon, the internal components for damage will be the damage repair or replacement temperature sensor.
1.4.2.5 check high-pressure electromagnetic valve: check whether electromagnetic valve damage high pressure if there is damage repair or replacement high-pressure electromagnetic valve; And high pressure electromagnetic valve normal inspection work high pressure electromagnetic valve line, first check control computer port if there is electricity through the check to determine normal electromagnetic valve is high pressure gas vehicle fault line.
1.5 gas car trouble five
1.5.1 gas vehicle fault phenomena
The loss of engine power, high water temperature, the use of natural gas and fuel fuel also gradually reduce table instructions (oil and gas &coal mixing).
1.5.2 gas vehicle troubleshooting steps and elimination method
1.5.2.1 check whether engine fuel nozzle seal lax cause dripping.
1.5.2.2 check the oil pump relay is functioning properly, found that damage repair or replacement pump relay.
1.5.2.3 check gas control computer is normal work by checking to make sure gas car trouble caused because the computer in gas and nozzle also work led to the oil and gas &coal mixing, repair or replacement gas computer.
1.5.2.4 check gas gush rail work is normal or not, whether have damage sealing closely found repair or replace the fuel gas gush rail in fuel process to prevent natural gas leakage to the engine in the cylinder, cause oil and gas &coal mixing.
The above mentioned gas vehicle fault phenomena, eliminate steps and methods and gas vehicle fault reason is direct injection suite is more common gas car trouble so the above exclusion methods applicable to the steps converted any a direct injection models.
Mixer type (closed loop system)
The closed-loop system models include: jetta, santana, fukang cars, etc.
2.1 gas vehicle fault a
2.1.1 gas vehicle fault phenomena:
2.1.1.1 vehicles in any case it is difficult to remove from heat start.
2.1.1.2 vehicle cold start easier but hot start difficult.
2.1.1.3 engine flameout in after a short period of time easier to start, but in the left after a period of time after the difficult start.
2.1.2 gas vehicle troubleshooting steps and methods
According to the above analysis 2.1.2.1 judge: first according to the first analysis in any vehicles are difficult to start, the first step to check your car engine whether there is gas car trouble with a special tool measuring engine cylinder pressure is normal, if not normal to the garage for repair, check valve clearance because too small to cause seal lax cylinder pressure is too small or because the engine wear serious (cylinder, the piston wear serious cause large clearance cylinder pressure is too small to engine start difficult), and the second check whether it is a normal vehicle fuel oil pump using a multimeter to measure power supply voltage, low battery that power is not enough, should be the accumulator or replace, through the check battery power by a multimeter enough (transferred to ohm resistance testing whether the file is too large, if the resistance value that line contact too part caused by poor oil pump doesn't work well), instead circuit of the intact check with fuel pump operating pressure of oil pump working pressure testing table, low pressure pump wear that serious, need to repair or replacement fuel pump, pressure in the fuel tank normal check whether shortages are causing pump didn't work properly and lead to start difficulties; Step 3 check gas control system will gas control computer and simulators dismantling the first appearance on check to see whether there is a computer circuit board ablation, etc have gas computer that trace if gas car trouble using a multimeter to measurement circuit board and integrated simulation system short circuit breakers have lines such as the instructions are phenomena such as gas simulators gas vehicle fault (nozzle can not work normally) lead to start difficult. According to the report of the second user analysis gas vehicle fault phenomena as cold start easy and hot start difficult, so will the fuel gas car trouble locked in the circuit of electric components just because only by the influence of the temperature. First with specialized tools detection of high pressure ignition coil ignition energy, such as the energy of the ignition that weak ignition coil gas vehicle breakdown maintenance or replacement ignition coil. Using a multimeter to will cylinder test line-measure resistance value that excessive cylinder line damage caused by the energy of the ignition conductivity poor weak engine is not easy to start, will spark plug the gap removed check whether too serious change such as the burning of the spark plugs. The third report according to user analysis: vehicles in the stall in short time after easier to start, but in after a time difficult start.
This gas vehicle fault phenomena commonly there are two reasons:
1, engine oil pump gas car trouble work can not reach the poor for a long time the pressure.
2, the fuel gas pressure reducing valve leakage or stepping motor fuel gas car trouble will first gas low voltage intake pipe road in foam coating removed in the outlet of the pressure reducing valve leakage testing whether that pressure reducing valve seal leak if internal components damage determine the leak site maintenance replace the seal components, step motor gas vehicle fault inspection step motor power plug whether firmly will step motor removed (start vehicles and then converted to natural gas inspection step motor is normal work, remove from heat sealing observation, such as the inspection found stepping motor work bad repair or replacement stepping motor).
2.1.3 gas vehicle breakdown reason
2.1.3.1 engine gas car trouble: long-term maintenance is not in place and use undeserved cause engine wear serious, individual components work such as bad.
2.1.3.2 gas pressure reducing valve gas car trouble: a long time with the use of internal pressure reducing valve seal components caused by aging seal leakage or lax daily use maintenance is not in place causes pressure reducing valve damage the internal components.
2.2 gas car trouble two
2.2.1 gas vehicle fault phenomena
Vehicle gas car trouble to speed up the phenomenon when adopting tempering, lack of engine power.
2.2.2 gas vehicle troubleshooting steps and elimination method
Vehicles appear tempering its gas car trouble while phenomenon reason probably can be classified into two categories:
(1) gas gas mixture of auto fault improper adjustment.
(2) engine ignition of fuel gas car trouble.
2.2.2.1 first test the fuel gas supply system: (1) started the engine and convert to CNG, using the computer programmer testing before the first step into the engine of the regular work first gear (that is, a programming console in just insert gas computer diagnosis occurs when the interface of the 3 do English letters in the first line) to detect a rare after mixture, adjust the mixture the normal concentration if mixture, quit into a programming console the second line (another program gas computer code programs) check gas computer code is incorrect, item by item, the discovery of the error check immediately change (1. Check the engine cylinder number is correct, it should be normal, if the wrong is that 4 cylinder should be adjusted to programming, first chosen according to the left lower programmer programming console coding to OK key flashing in the right key, adjust the correct adjustment, then press OK sure. 2. The throttle valve normal working voltage: jetta for 5-0 V; santana and fukang 0-5 V such as check wrong according to the above adjustment method adjustment. 3. Stepping motor work the normal work of the voltage value for: 0.38-0.34 V, stepping motor drive degrees adjustment value for 240-20. Such as the inspection according to the above is the adjustment method for adjustment).
2.2.2.2 check ignition system: with special tools detection ignition system, testing ignition strength. If a fire intensity weak item by item according to the steps to rule out, check the ignition coil, the high tension line and spark plug the original found gas vehicle maintenance or replacement parts, the gas car trouble shooting.
2.2.3 gas vehicle breakdown reason
2.2.3.1 gas part gas car trouble:
(1) the fuel gas suite use time long, cause serious internal pressure reducing valve wear spreads too big.
(2) the daily maintenance of improper use, the special people improper adjustment or damage.
(3) outside the vehicle maintenance, maintenance of fuel gas content may cause interference computer, memory coding error bad work.
2.2.3.2 ignition system gas car trouble: ignition system auto fault original gas long-term maintenance is not in place or time limit is not mandatory to replace cause ignition strength too weakly engine working poor. (cylinder line insulation aging skin caused by leakage, ignition coil gas car trouble, the spark plug gap too big).
2.3 gas car trouble three
2.3.1 gas vehicle fault phenomena
Vehicle gas car trouble for the idle phenomenon when work is not even engine, engine shaking, high gas consumption, gas and fuel also gradually reduce or fuel and gas also gradually reduced.
Gas car troubleshooting 2.3.2 steps and elimination method
2.3.2.1 according to the vehicle auto fault phenomena gas analysis can be divided into two roughly (1) gas part gas car trouble: gas mixture adjustment too high or low concentration of improper, gas suite aging damage caused seal leakage, gas control lax computer gas car trouble, simulators gas car trouble cause at the same time, the burning gas injection nozzle continue to gush oil cause oil and gas &coal mixing, the loss of engine power and lead to engine idling instability, gas consumption, and the high gas vehicle fault phenomenon; Individual cylinder engine work of cylinder ignition strength (bad was weaker, lax, throttle valve seal dirty work bad or engine wear serious leading to engine didn't work properly, create vehicle power down idle instability, high gas consumption of gas vehicle fault phenomena. Check the gas and auto fault root repair and eliminate the auto fault gas.
2.3.2.2 gas vehicle breakdown reason
(1) gas system suite quality problems caused by engine gas car trouble.
(2) gas system improper use of fuel gas system failure gas vehicle engine run is not even. (3) daily maintenance is not in place, cause gas suite premature failure and worn engine parts, etc.
2.4 gas car trouble four
Gas is against 2.4.1 auto fault phenomenon
After the engine starts converting stall
2.4.2 gas vehicle troubleshooting steps and elimination method
2.4.2.1 according to the gas car trouble on analysis phenomena and remove the fuel gas car trouble. (1) first check whether natural gas cylinder in there. (2) check gas control computer and transfer switch whether there is gas car trouble. (3) to examine stepping motor work is normal or not. (4) pressure reducing valve gas car trouble: high and low voltage electromagnetic valve damage or don't have electricity the power cord, pressure reducing valve internal original damage etc. (5) check whether there is a gas vehicle fuel gas circuit fault take iron bad, the contact with oil and gas not to convert or caused by poor after converting to stall. The findings by the gas car trouble timely maintenance rule out gas car trouble.
2.4.3 gas vehicle breakdown reason
2.4.3.1 gas suite quality problem, the user is used undeserved or long-term maintenance and maintenance is not in place cause gas system occurring gas car trouble.
The above mentioned gas vehicle fault phenomena, eliminate steps, elimination method and gas vehicle fault reason is closed loop suite is more common gas car trouble so the above exclusion methods applicable to the steps converted any a closed loop models.
Mixer type (the open loop system)
The open loop system main models: cars, bread, and buses, etc
3.1 gas vehicle fault a
3.1.1 gas car trouble phenomenon
(1) vehicles in any case it is difficult to remove from heat start.
(2) vehicles cold start easier but hot start difficult.
Gas car troubleshooting 3.1.1&3.1.2 steps and methods
3.1.2.1 according to the above analysis judgment: first according to the first analysis in any vehicles are difficult to start, the first step to check your car engine whether there is gas car trouble with a special tool measuring engine cylinder pressure is normal, if not normal to the garage for repair check valve clearance because too small to cause seal lax cylinder pressure is too small or because the engine wear serious (cylinder, the piston wear serious cause large clearance cylinder pressure is too small to engine start difficult). Step 2 check the vehicle fuel is functioning properly using a multimeter to measure the oil pump power supply voltage, low battery that power is not enough, should be the accumulator or replacement. Through the check battery power enough (using a multimeter to transfer to the ohm resistance testing whether the file is too large, if the resistance value that line contact too part caused by poor oil pump doesn't work properly); Instead circuit of the intact check with fuel pump operating pressure of oil pump working pressure testing table, low pressure pump wear that serious, need to repair or replacement fuel pump, pressure in the fuel tank normal check whether shortages at petrol pump can't reach to the oil pump didn't work properly and lead to start difficult. Check gas system simulation is whether there is gas car trouble, check the simulator is functioning properly, the line whether there is some way or short circuit fault phenomena such as gas car repair or replacement; According to the report of the second user analysis gas vehicle fault phenomena as cold start easy and hot start difficult so will gas car trouble locked in the circuit of electric components just because only by the influence of the temperature. First with specialized tools detection of high pressure ignition coil ignition energy, such as the energy of the ignition that weak ignition coil gas vehicle breakdown maintenance or replacement ignition coil. Using a multimeter to will cylinder test line-measure resistance value that excessive cylinder line damage caused by the energy of the ignition conductivity poor weak engine is not easy to start. Will spark plug the gap removed check whether too serious change such as the burning of the spark plugs.
Gas vehicle fault reason 3.1.3 pruning
3.1.3.1 engine gas car trouble: long-term maintenance is not in place and use undeserved cause engine wear serious, individual components work such as bad.
3.1.3.2 gas system gas car trouble: gas system parts quality problems, the user is used undeserved cause gas vehicle fault or electrical original does not pay attention to waterproof, etc.
3.2 gas car trouble two
3.2.1 gas vehicle fault phenomena
Vehicle gas car trouble to speed up the phenomenon when adopting tempering, lack of engine power, etc
3.2.2 gas vehicle troubleshooting steps and elimination method
General vehicles appear tempering its gas car trouble while phenomenon reason probably can be classified into two categories: (1) gas gas mixture of auto fault improper adjustment; (2) engine ignition of fuel gas car trouble.
3.2.2.1 check ignition system: with special tools detection ignition system, testing ignition strength. If a fire intensity weak item by item according to the steps to rule out, check the ignition coil, the high tension line and spark plug the original found gas vehicle maintenance or replacement parts, the gas car trouble shooting.
3.2.2.2 gas system gas car trouble: (1) the pressure reducing valve adjust caused a rare mixture; (2) low pressure pipe gas vehicle fault lines have blocked a thin air mixture caused not free, etc.
3.2.3 gas vehicle breakdown reason
3.2.3.1 ignition system gas car trouble: ignition system auto fault original gas long-term maintenance is not in place or time limit is not mandatory to replace cause ignition strength too weakly engine working poor. (cylinder line insulation aging skin caused by leakage, ignition coil gas car trouble, the spark plug gap too big).
3.2.3.2 gas system gas car trouble: use daily maintenance is not in place, adjust the improper or gas suite quality problems cause the engine to bad.
3.3 gas car trouble three
3.3.1 gas vehicle fault phenomena
3.3.1.1 vehicle gas car trouble for the idle phenomenon when work is not even engine, engine shaking, gas, gas at the same time for fuel also gradually reduce or burning oil and natural gas is also gradually reduced. (the idle instability, gas consumption high, oil and gas &coal mixing)
3.3.2 gas vehicle troubleshooting steps and elimination method
3.3.2.1 according to the vehicle auto fault phenomena gas analysis can be divided into two roughly (1) gas part gas car trouble: gas mixture adjustment too high or low concentration of improper, gas suite aging damage caused seal leakage, lax gas simulators gas car trouble in gas at the same time, cause the nozzle continue to gush oil cause oil and gas &coal mixing, the loss of engine power and lead to engine idling instability, gas consumption, and the high gas vehicle fault phenomenon; Individual cylinder engine work bad lack of cylinder (ignition strength is weak, valve seal is lax, throttle dirty work bad or engine wear serious leading to engine didn't work properly, create vehicle power down idle instability, high gas consumption of gas vehicle fault phenomenon). Check the gas and auto fault root repair and eliminate the gas car trouble.
Gas vehicle fault reason 3.3.3 trace
3.3.3.1 gas and engine part gas car trouble: (1) the gas system suite quality problems caused by engine gas vehicle fault (2) gas system caused by improper use gas system gas car engine operation failure is not even. (3) daily maintenance is not in place, cause gas suite premature failure and worn engine parts, etc.
3.4 gas car trouble four
3.4.1 track of gas vehicle fault phenomena
Engine can start but conversion gas soon after flameout or not to convert
3.4.2 gas vehicle troubleshooting steps and elimination method
3.4.2.1 according to the gas car trouble on analysis phenomena and remove the fuel gas car trouble. First check whether natural gas cylinder in there. (2) check gas transfer switch whether there is gas car trouble. (3) to examine low pressure pipe is blocked. (4) pressure reducing valve gas car trouble: high pressure electromagnetic valve damage or the power cord no voltage, pressure reducing valve internal original damage etc. (5) check whether there is a gas vehicle fuel gas circuit fault take iron bad, the contact with oil and gas not to convert or caused by poor after converting to stall. The findings by the gas car trouble timely maintenance rule out gas car trouble.
The rule 3.4.3 gas vehicle breakdown reason
3.4.3.1 gas suite quality problem, the user is used undeserved or long-term maintenance and maintenance is not in place cause gas system occurring gas car trouble.
The above mentioned gas vehicle fault phenomena, eliminate steps, elimination method and gas vehicle fault reason is the open loop suite is more common gas car trouble so the above exclusion methods applicable to the steps converted any a ring opening models