You will need
- - the wrench;
- - drill with a thin drill bits;
- - screwdriver, hammer;
- - liquid WD 40
Before removing the lambda sensor, disconnect the negative cable from the corresponding terminal of the battery. Disconnect the connector wires extending from the sensor. Disconnect the fasteners of the transaction. Then the key 22 or 24 try to Unscrew the probe from the exhaust manifold. If it fails, even with maximum effort, it means that the thread is stuck over the years of operation, or initially the sensor is out of alignment.
Liquid spray WD 40 on the visible surface of the thread of the lambda and try to Unscrew it open (the gas) is a key, or pull down. If this does not work, drill the full diameter of the probe. The material from which it is made, is of high strength, so be prepared for the fact that when drilling will be broken a few drills. In the hole insert a flat-bladed screwdriver of adequate thickness and try to Unscrew the sensor. If necessary, tap the screwdriver or sensor with a hammer.
Remove the catalytic Converter or the exhaust manifold. Any way heat the installation site of the lambda and try to twist it. In case of failure repeat attempt after cooling of the metal. With this method, you heat the installation place of the probe and the thread. The rust in the threads, unlike metal, does not expand, and leads to the formation of microcracks. This allows in many cases relatively easy to Unscrew the sensor.
After applying extreme ways the dismantling of lambda in the thread of the fixing hole may remain remnants of the old sensor. To clean the thread take a suitable die and gently run it through the thread. Then clean from small chips and process liquid WD 40 to after installing a new sensor you could remove it without problems.
On some models of Japanese cars lambda probe screwed into a specialized nut that can be replaced after unscrewing the sensor. Pre-order or buy this nut. The cost is low, but the time of delivery of your order may take a couple of weeks.
Advice 2: How can I clean the lambda probe
Lambdaprobe – oxygen sensor-catalytic Converter exhaust system of a vehicle. On used cars it may be contaminated, which leads to increased fuel consumption. The purchase of a new sensor, the price of which reaches 30000r too problematic.The only way to clean the lambda probe
You will need
- Phosphoric acid, a thin brush with natural bristles. Preferably lathe with a sharp cutter.
Under a protective cap the working surface of the lambdaprobe gets contaminated with carbon and lead deposits. As a result, the sensor becomes incorrect. After cleaning the surface normal operation of the lambda probe is restored. Ceramic base working surface of the sensor is covered with a thin layer of platinum deposition, so cleaning the device is mechanically prohibited.
Method of cleaning the lambda probe is a 20-minute washing it in phosphoric acid. This acid dissolves plaque without harming the platinum electrodes. After rinsing the sensor is opened. Procedure opening: on a lathe at the base cut off the protective cap. Work is carried out carefully, using fine cutter. The use of a hacksaw on metal is strictly not recommended because of risk to protect the ceramic sensor.
Using a thin brush with natural bristles, phosphoric acid is uniformly applied to ceramic rod lambda sensor from all sides. Washed only working part of the probe, and the sensor in the acid is not absorbed. Dirty rod has a black-brown color. The net needs to have a steel tint. After cleaning the sensor should be well rinsed with water and dried. The protective cap is welded with argon welding. If argon welding is no, then before cleaning the lambda sensor cap is not cut. With a file in it bore two Windows with a width of 3-4 mm. the wash Procedure acid takes place with a brush using the Windows.
Pre-checking the condition of o-rings, cleaned the lambda sensor screwed in place. The process of cleaning an oxygen sensor deposits can be repeated unlimited number of times, the extent of contamination. If cleaning the sensor did not affect its work, replace the sensor.
Avoid contact of phosphoric acid with his hands. The acid causes severe burning of the skin on the hands.
Instead of phosphoric acid, you can use a rust Converter, which is composed of this acid.
Advice 3: How to check lambda probe multimeter
Increased fuel consumption, jerks with a sharp set of speed, the elevated level of toxicity, all these problems can be caused by a failure of a small device called a lambda probe or oxygen sensor.
Its function is the regulation of the ratio of air and fuel in the combustion chamber. If the mixture is too lean or too rich, the sensor will give a signal to the control unit and that will fix the situation. The manufacturer may equip their vehicles with several types of lambda probes. The device can be one-, two-, three-and even four-way. In any case, one of the wires – the signal (usually it is black), the other for the heater (usually white). On a car where you've installed the oxygen sensor without heater, you can put any lambda probe heater (connect the "extra" wires need to be run through relay), but the opposite can not be done.
The output of the oxygen sensor failure may be due to several reasons, among which the most often – using poor or crude gasoline, which can be caused by a malfunction of the fuel pressure regulator, gasoline contamination of the filter. Among other reasons:
- contact with the sensor housing coolant (or brake) fluid;
- cleaning the housing lambda probe means which are not designed for this.
Check sensor tester
First, make a visual inspection of the sensor. If there are multiple deposits in the form of soot, lead, or a light grey patina, then its best to replace. If the lambda probe is relatively clean, you can conduct further tests (need assistant). Start up the engine, warm it to a temperature of 70-80C. Look at the sensor signal wire and have an assistant raise the number of revolutions of the crankshaft to 2500-3000. Hold this mode for 3 minutes to warm up the sensor.
Now measure the voltage on the signal wire (negative probe of the tester connect to the mass of the car) - it must be in the range of 0.2 to 1V and not be constant, and be off with the approximate frequency of 8-10 times per second. With a sharp press on the accelerator pedal defective sensor will show a voltage of 1V, when a sharp pedal is released, it will fall to almost zero. If the voltage on the signal wire does not change and is equal to approximately 0.4-0.5 V, the sensor needs to change. In the absence of voltage, it is necessary to ensure good transaction; "bell" wire tester suitable to the ignition switch or relay. Also check the ground to the heater of the lambda probe.