Steyr 91 series heavy duty truck air filter maintenance guide

Steyr 91 series heavy-duty truck engine adopts a dry air filter. Hyundai increased use of paper air filter, high efficiency air filter paper, Auto Diagnostic Tool test data shows that only 0.1% to 0.3% transmittance of dust. Use paper air filter can reduce wear of the cylinder and piston, extending engine life. Should be used with care and attention to the following points:

(1) Master the characteristics of wd615 engine paper filter and cleaning method
This air filter, the outer filter element is treated with microporous filter paper, and the surface is treated by resin.. In the engine operation, the air filter through the microporous filter to the dust, ensure clean air into the turbocharger and then into the cylinder. Senior internal filter made of felt, a safety cartridge. In use, the filter will pick up around the outer layer of dust. Clean the air filter outside filter, not used water, oil, should prevent oil dip filter; commonly used method is to gently pat. Specifically: gently tap on the tire, beat the dust out, and then dried 0.4mpa the following air purge. When the purge should be blown inside out.

(2) Regular cleaning and replacement of filters
In Steyr 91 series of heavy-duty vehicles so that there shall maintain provisions for periodic air filter cleaning and replacement, in order to avoid excessive dust adhered to the filter, causing the intake resistance increases, reducing engine power and increased fuel consumption. Cars with 2000 ~ 4000km, air filter (inside and outside) clean, replace the filter at the outer 12000km, Launch X-431 PAD or Launch X431 Diagun III tool checks show that: in the best six months to replace the filter. If the filter is damaged should be replaced promptly.

(3) Installed correctly
In the inspection and maintenance of air filters, the seal on the filter pad must be installed well. Rubber gaskets easy to aging and deformation, the air is easy to flow through the gap from the seal, the dust into the cylinder. If the gasket aging, the best replacement of the air filter. External filter meshes such as rupture or the upper and lower end caps glued joints cracked should be replaced.

Dry air filter is passed through a dry filter, such as paper filter, the air impurities in the filter. Light vehicles (including cars, mini-cars) is generally used as a single-stage air filter. Its oval or elliptical shape and flatbed. The filter material is filter paper or nonwoven fabric. Filter cover with metal or polyurethane, the shell material is a metal or plastic. At rated air volume flow, original filtration efficiency filter should not be less than 99.5%.

Heavy duty vehicle due to poor working conditions, it must be more than one air filter. The first stage cyclone pre-filter (such as a blade ring, swirl tubes, etc.), used to filter impurities coarse particles, filtration efficiency above 80%, the second stage fine filter is a porous paper filter (commonly referred to as primary filter), the filtration efficiency of 99.5%. after the main filter element and a security filter, its role is in the installation and replacement of the main filter element, or in the main filter accidental damage, to prevent dust from entering the engine, you can regularly for the use of Xtool PS2 or Autel Maxidiag Elite MD703 tools to check the engine performance, the core material more secure non-woven fabric, but also the use of filter paper.
Source: http://www.focalobd.com/blog/steyr-91-series-heavy-duty-truck-air-filter-maintenance-guide/

Cleaning the car what should pay attention to?

Wash the car is not just for the purpose of keeping car surface bright as new, a lot of time washing is intended to better protect the paint effect. But the seemingly simple car wash also prone to error, you can use the OBD Diagnostic Tool to easily check out the car problem.

Wash the car number should not be too frequent, otherwise it will accelerate paint oxidation, if the weather such as dust, dirt, rain, after the owner should to clean vehicles as soon as possible. Also, if a long time without washing car, the harmful material such as acid ingredients and dust in air erosion and adhesion, will accelerate the aging and damage to the car paint. Paint damage will make the body lose protection and oxidation of metal parts, causing the vehicle to earlier damage. Therefore, the car once a week is the best frequency.

When choosing a the sun is not very strong car wash is best, because the weather was there won't be because of the glare and bring damage to the car paint, and don't have to worry about because it's cloudy and residual moisture evaporation. Vehicle cleaning after the completion of inspection, It is best to use the Launch X431 V+ Pro3 or Launch X431 Creader VII+ tool to check the vehicle after cleaning, carefully check and wipe after pulled out of the vehicle cleaning area. This is because the body is not dry, machine cover, glass glue slot etc. easily attached to dust.

Many owners choose to do it yourself car wash, you should first select the car wash windless cool place, do not let the car in the hot sun or exposed to air, it should be noted once again choose the correct washing tools, wash the car before check whether Autel MaxiTPMS TS401 or Autel MaxiDiag Elite MD802 tools clean, at the same time, should master skills necessary in the car wash, wash the car at the beginning of the first wash car body in the sand, dust, etc., after the end of the car wash should wipe clean the car, use a towel to wipe should be separated with a car wash towels.
Source: http://www.focalobd.com/blog/cleaning-the-car-what-should-pay-attention-to/

How to buy automotive air conditioning filter and refrigerant

Some owners for air-conditioning system maintenance, how to choose the right accessories to do air conditioning maintenance will encounter many problems. Due to the owners of vehicles are not familiar with, and don't want to use Auto Diagnostic Tool to check, so here we give you a introduction to buy these accessories:

1. How to buy air filters?
Air filter: quality of original brand quality long-term air conditioning filter with respect to the poor quality of ordinary Deputy plant air filter, in the service life and impurity filtration efficiency to far wins a chip. Can guarantee the higher impurity filtration efficiency and extend the maintenance cycle.

2. Refrigerant How to choose?
Refrigerant: Pure brand R134a environmental refrigerant, it can ensure 2--3 years of life. Currently on the market of the refrigerant uneven, some good and some bad, media have exposed automotive air conditioning refrigerant sample test pass rate is currently less than 10%. If you use of counterfeit refrigerant in a short time can refrigeration, but long-term use, light will produce refrigerant leakage, resulting in automotive air conditioning and refrigeration effect is not good, will lead to serious damage to the air conditioning compressor, if use Launch X431 V Pro or Launch X431 IV GX4 tool to check in advance, can quickly check out the fault. So when buying refrigerant, must pay attention to choose the high quality brand pure refrigerant.

Buy air filters, refrigerant and air conditioning cleaning agent must pay attention to product quality, quality air filters, air conditioning refrigerant and air-conditioning cleaning agent can play a very good protection, increase of air conditioning refrigeration effect, kill in air conditioning mold and bacteria, eliminate odor, recovery and the freshness of the air inside the car, but inferior air filter, refrigerant and air conditioning cleaning agent not only can not achieve the effect, but will damage parts of the air conditioning system, use the Autel MaxiSys Pro MS908P or Autel MaxiTPMS TS601 tools to check parts of the air conditioning system performance, inferior products will reduce the service life of the air conditioner and the human health will be affected.
Source: http://www.focalobd.com/blog/how-to-buy-automotive-air-conditioning-filter-and-refrigerant/

Anti-lock braking system ABS function introduction

Anti-lock braking system ABS can be installed on any car with hydraulic brakes. It is the use of the valve body of a rubber balloon, when put on the brakes, giving the brake oil pressure, flooded to the ABS valve, when the airbag use compartment in the middle of the air pressure to return, so to avoid wheel lock dead center. When the wheel is about to reach a dead lock, brake oil pressure the effects of repeated balloon, under the OBD Diagnostic Tool check, found in a matter of seconds can be 60 ~ 120 times, in does not stop brake, relax. ABS is composed of wheel speed sensor, engine speed sensor, solenoid valve, computer and hydraulic control unit (hydraulic regulator), and its characteristics are as follows four:

1, ABS with excellent performance and self diagnostic capabilities, you can rest assured that use. In addition, the use of ABS and the common brake system using almost the same, braking to foot on the brake plate normal braking can be, ABS will own the brake hold at the optimal point.

2, the car brakes, the braking force of the four wheels are different, if the car's front wheels to lock, the driver can not control the direction of travel of the car, prone to risk of a collision, if the first locking the rear wheels, can appear the skidding, tail flick, if installation of ABS, can avoid four wheel is locked, Launch X-431 PAD or Launch X431 GDS tool can detect ABS data, the ABS system improve the stability of the vehicle in the braking process;

3, compared with the conventional braking system, under the state of emergency braking, ABS can make the wheel in both rolling and drag, which greatly increases the tire and the ground friction and shorten the braking distance, namely the so-called optimal braking point or region, while the ordinary brake system is unable to do this;

4, It is proved that the wheel fully locked will cause tire cup type wear, make the uneven abrasion on the tire surface, thereby increasing the tire wear and tear.

Thus, ABS anti-lock system, can avoid the braking when the direction is out of control and wheel sideslip, make the wheel when the brakes are not locked, don't let the tire friction with the ground at one point, so as to increase the friction, in the Autel MaxiSys MS908 or Xtool PS2 tool checks found, ABS system makes the brake efficiency of 90% or more, while reducing brake consumption and extend brake drum, disc and double the life of the tire. Vehicles equipped with ABS in dry blacktop, rain, snow, skid resistance reached 80% - 90%, 30%, 10%, 15% - 20%.
Source: http://www.focalobd.com/blog/anti-lock-braking-system-abs-function-introduction/

How to correct replace fuel filter

Fuel filter is contained in the fuel in the iron oxide, dust and other solid impurities removed, to prevent clogging of the fuel system, reduce mechanical wear and ensure stable operation of the engine, and improve reliability. Fuel filter is a fine part, in use for some time, use the Auto Diagnostic Tool to check the fuel filter performance, if the fault code is 00538, need to replace the fuel filter. Method is as follows:

First, loosen the clamping device at the junction of the oil and fuel filter, then removed fuel filter from the oil passage, followed by a stopper oil passage, so you can prevent fuel spillage. Most of the oil installation in the fuel filter is marked with two arrows, one is the fuel flowing into the arrow, and the other is the fuel outflow arrows, with arrows to indicate the flow of fuel through the fuel filter when. So when we installed the fuel filter, be sure to make the arrow pointing the direction of the engine, that the engine oil is flowing.

In addition, it should be noted that the clamping device in the circuit used is specially designed, rubber hoses and fuel filter in the junction of these two components tightly clamped to achieve sealing effect. Compared with the ordinary clamping device, this device does not cut into the rubber hose, and therefore does not cause damage to the rubber hose, and this clamping device can withstand high oil pressure. In contrast, the ordinary worm type clamping device more easily damage rubber hose caused fuel leakage. Finally, we should also ensure that the rubber hose clamp device is installed in the correct position and in accordance with the specified specifications of the clamping joint.

If the vehicle is without the need to maintain the fuel system, and only use a built-in to the fuel filter, then in vehicle periodic preventive maintenance process, it is not possible to the oil pump, a filter and a fuel output device all replaced, even automotive preventive maintenance interval is long, it is impossible to do that, because of the high cost of doing. But if you use Launch X431 V+ Pro3 or Launch X431 Diagun III tools to check the. It is found that the anomaly of the working performance of the engine, the fuel pressure and fuel system in the critical value, replace the fuel filter placed inside the tank is very necessary.

When using this lute-shaped coupling member also noted that during the installation process must not make the wrong buckle connecting thread situation appears, it should not be applied in large part on the binding of clamping force. Do not use RTV or other types of seals on these lute-shaped coupling member. When installing the coupling member, use wrench to ensure proper clamping force.

After completion of maintenance work on the fuel filter, put all the parts are assembled, replace the fuel pump fuse, and then, in the case of the ignition system does not work, the engine is rotated several turns, until the establishment of the fuel system far from normal when the fuel pressure. At this point, you should check the fuel filter and oil line for leaks. If Autel MaxiScan JP701 or Autel MaxiDas DS708 tool test results show that everything is normal, start the engine run a few minutes, and then re-check again to make sure there are no leaks happen.
Source: http://www.focalobd.com/blog/how-to-correct-replace-fuel-filter/

Audi A6 car exhaust pipe black smoke

Audi A6 car engine operation of the exhaust pipe a small amount of black smoke emitted, exhaust gas is faulty. After testing, the engine power was normal. OBD Diagnostic Tool connector perform self-diagnosis, the engine system has a fault code, reads "00561, mixture adjustment exceeds the limit." Executive DTC Clear function, the fault code is cleared. Fault analysis, there may be poor oxygen sensor performance. View the data flow (functional path 01-08-007), the idle mode of the 007 data block 1 zone data (mixed gas formation control value) for -25%, 2 District data (oxygen sensor signal voltage) of 0 809V. Under normal circumstances, the mixture formation control value should be within the range of -10%, 10%, and the fluctuation of the mixture of the mixture is slightly fluctuation with the fuel injection quantity.. -25% data shows that the engine control module attempts to reduce fuel injection, in order to control the concentration of mixture in normal range. The signal voltage of the oxygen sensor is 0 809V, partial rich mixture, in conformity with the fault phenomena of the smoke.

By the principle of fuel injection, the engine control module mainly according to engine speed signal, air flow sensor signal to determine the basic fuel injection quantity, use the Launch X-431 PAD or Launch X431 GDS tool to check air flow sensor. Select the feature path 01-08-002, view the air flow sensor data (4 area data). The air flow at idle speed is about 7.5 kg/s, which is obviously larger than the normal 2 0kg/s -4... The 2 zone data is the theory injection time (crankshaft to a circle), the 3 zone data for the engine a working cycle of injection time (actual injection time). The actual injection time is on the basis of theory of injection time correction of, should be twice fuel injection time and the car of the two injection time almost the same it proves that the theory of injection time is too long, after correction of the actual injection time shorter. When the fuel injection time correction exceed the limit, the failure code will occur 00561. The result of the above detection is that the cause of the fault is the air flow sensor signal is too big 6 replacement air flow sensor, the fault completely ruled out.

Since the air flow sensor signal in the car idling just too high, and in the part-load conditions and acceleration conditions are normal, and therefore less impact on the overall condition of the engine, fuel consumption is not significantly increased. In addition, by Autel MaxiSys Pro MS908P or Xtool PS2 dynamic data analysis process it can be seen, although the engine control module based on the oxygen sensor signal identification to the mixture is too thick, but no corresponding reduction in the fuel injection quantity so that the concentration of the mixture back to normal, the reason is, fuel injection depending on the amount of engine intake air, engine speed, oxygen sensor signal is only a feedback signal as a mixed gas under closed-loop control mode, the fuel injection quantity correction within a certain range.
Source: http://www.focalobd.com/blog/audi-a6-car-exhaust-pipe-black-smoke/

Audi A6 engine abnormal sound fault analysis

Audi C5A6 equipped with 1.8T engine and automatic transmission, driving mileage of 50000 km. Car owners reflect the engine in 2,3 gear acceleration have abnormal noise, the abnormal noise has lasted about half a month's time, through the OBD Diagnostic Tool to check, the sound becomes apparent.

After testing, in 2, 3 block accelerated heard engine abnormal noise, listen to the voice really like engine knock, but the power of the engine were not affected by any effect, accelerate the engine sound all normal. Combined with the failure analysis, the engine at 2,3 gear acceleration can send different sound There are several reasons:

(1) variable valve timing mechanism fault. Because in the 2,3 gear acceleration engine has entered the medium-load conditions, according to the characteristics of the engine, the valve timing should have entered the adjustment position, adjust the mode by changing the position of the chain tensioner to achieve. According Launch X431 V Pro or Launch X431 IV GX4 tool check, found that when the chain camshaft adjustment, if the chain tensioner lack of strength will make the chain in a relaxed state in the adjustment process and beep.

(2) Since the engine knock sound is generated. That there are several possibilities: ① fuel octane low lead to knock. This car's engine may be use 93 unleaded gasoline, it is best to use 95 unleaded gasoline, otherwise it will produce detonation. ② ignition timing is premature detonation. To further understand the failure, you can use Autel MaxiScan MS509 or Autel MaxiScan VAG405 tools to detect, which can quickly check out the car parts problem.
Source: http://www.focalobd.com/blog/audi-a6-engine-abnormal-sound-fault-analysis/