Overheating and dirt of a catalytic converter has negative influence on the emission of exhaust gases. The testing of the exhaust gas pressure allows a quick catalyst diagnosis. The connection is at the exhaust gas system between engine and catalyst by means of a thread connector instead of the Lambda probe. The connector can be coupled with the pressure hose.
Gauge with protective rubber cap, DS 63 mm (2 1/2"), range -1...+3 bar, equipped with a red/green marked scale. When the indication remains within the green area, the catalytic converter is in order; however, if the catalyst is defective or propped, the indication is in the red area.
A part of the exhaust gas test - the circuit test - is effected to guarantee that the Lambda probe is working correctly.
By means of the adjustable disturbance air valve SV 01, a precisely measured quantity of disturbance air is introduced to the engine at a defined spot. The disturbance air with the SV 01 can be introduced from 0.0 to 2.3 mm.
The leak test is carried out when the engine is cold. The test device works using workshop compressed air and an integrated pressure regulator. The display is provided by a pressure gauge with a measurement range of 0 to 600 mbar.
A pressure drop is indicative of possible leaks in the SCR system. The leak is localized acoustically by listening for the noise of escaping air , or with the aid of a leak spray.