Frequently asked questions about «VTN» products

1. - I have a standard for old cars voltage in the network – 13,9 V. I put a “calcium battery”, which requires a higher voltage, as well I have fog lights and high-power car stereo system. How can I increase the voltage on the network?

Install an overvoltage regulator with voltage regulation directly at the alternator output. For example, 1702.3702-01 for VAZ-2108 (09), 9111.3702 for VAZ-2110, 9432.3702-02 for vehicles manufactured by AvtoZAZ (it is necessary to match the type of alternator). Also, when using the vehicle with long pauses idling to provide the desired energy balance is recommended to increase the level of idling.

2. - The voltage value when measured by the tester at the output of the alternator is about 14,2 Volts, but when the headlights are on, it decreases to 13,5 V, and when the cooling fan is turned on, the voltage drops to 13 V. I changed the voltage regulators, but did not see a positive effect.

The regulator, by its nature, is not a source of energy, it only limits and regulates the voltage of the alternator at a given level. Load characteristic of regulators «VTN» ±0,1 V from the given level. Anything below is the inability of the alternator to provide the desired current at a certain speed. You can see the standard load characteristic below:

If the energy balance is insufficient, a possible solution is to increase the idle speed, or increase the ratio of the pulleys to the alternator. All measurements should be made with a high quality instrument directly at the alternator outlet. First of all, measure the voltage at different loads at medium / high speeds, since at idle there is not enough energy output from the alternator to provide a large current.

3. - When starting the car, the voltage on the alternator at medium speed immediately has a value of 14,3 V, but after a while it drops to 14,0 V. Can't you make a stable regulator!?

It is impossible! The battery must be charged exactly according to the type of battery (regular/calcium) as well as its temperature. As the temperature rises, the voltage should decrease. Therefore, thermal compensation is introduced into the regulator. Usually the ambient temperature is measured, and in some cars an electrolyte temperature sensor is used. In different types of regulators from different manufacturers, thermal compensation is different. In addition, regulators with a high level of residual voltage get very hot, and this temperature affects the accuracy of the regulation voltage setting. Therefore, it is very important to use regulators with low residual voltage, as they have low intrinsic heat generation, and the voltage reduction occurs more closely in line with the ambient temperature.

4. - I have bought the VTN ignition controller 131.3734-11. A start has been improved, but an engine still misfire on some revs.

This type of ignition controller is designed for an ignition system that meets the specified tolerances. In some old cars, the distributor is so "loose" that the microcontroller no longer understands signals that are outside the calculated range, and goes astray.

You can install another type of ignition controller (for example, 90.3734), it will work correctly (or try to use the ignition controller from other manufacturers), but the car will still have a low power and high fuel consumption. It is recommended to align (or replace with a new one) the autotrembler and its drive device. Or find another possible problem.

5. - You have 4 types of ignition controllers on the VAZ-2108 (09) on your website VAZ-2108(09). What is the difference between them?

The main two differences are the presence or absence of a signal on the tachometer on the contact #7 as well as various switching current (7 A or 7,5 A). You can see the rest of the differences by comparing the parameter tables of all four types.

6. -Recently I have installed your TPS sensor. The car immediately began to move smoothly, jerks disappeared when revving and throttle response increased. However, sometimes idle floats.

Contactless TPS sensors 3102.3855, 3202.3855, 3302.3855 - are electronic type of sensors, built on electronic circuit using a bridge sensor of magnetic field and microcontroller. Its current consumption is about 10 mA. Established sensors used on most vehicles are mechanical sensors of resistive type, with a current consumption of about 1 mA. In the vast majority of vehicles such difference in consumption of current does not matter and electronic sensors work without resource constraints, with much higher settings than mechanical. However, in some vehicles it is possible that due to defective circuits (for example, increased resistance of chain «0V») or because of the limitations of the current in the power supply ECU, electronic sensor may not work properly. As practice shows, to find a specific defect in such case is quite difficult (it requires high skills and special measurements). In this case it is recommended to return the sensor to the commercial network labeled «not suitable» and continue to use mechanical sensors with low current consumption.

7. - I have a Daewoo Lanos 1.4i 2008. I want to change my TPS for a sensor of your production. Which one should I choose?

The auto assembly plant installed different throttle assemblies at different times. Lanos 1.4i was equipped with TPS 3202.3855 or TPS 3302.3855. The easiest solution is to remove your sensor and review its design, paying attention to the shape of the sensor shaft and the direction of its rotation. If the shaft is in the form of a truncated cone with a lip, then you need 3202.3855. If the shaft has a cross shape, then the analogue will be 3302.3855. You can also compare them according to the direction of rotation of the shaft (see sensor descriptions).

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