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Exhaust Back Pressure Test Specs
Exhaust Back Pressure Test Specs. If the readings are high at this point, the blockage probably exists downstream of the test point, which typically means it is in the muffler or resonator. L= length of pipe in meter.

In a turbocompound engine, the exhaust back pressure should be increased to create more turbine power; Install the back pressure gauge assembly into the exhaust. This point is marked along the line of the increased back pressure.
If The Readings Are High At This Point, The Blockage Probably Exists Downstream Of The Test Point, Which Typically Means It Is In The Muffler Or Resonator.
Simply connect into the exhaust system using either of the two oxygen sensor dummy adaptors supplied in the kit. Install the back pressure gauge assembly into the exhaust. Remove the o 2 sensor from the exhaust.
Start Your Vehicle, And If Your Engine Has An Air Pump, Tap At The Air Pump Check Valve.
Q = exhaust gas flow in kg/m3 s = density of gas kg/m3. How to test for a plugged exhaust (picoscope and psi transducer) part 2. Used to establish the working condition of the catalytic converter and silencer by measuring the relative back pressure of the system.
What Kind Of Numbers Should I Be Getting From The Exhaust Backpressure Sensor?
1 psi equals 6.89 kpa, and 1 kpa equals 0.145 psi). If < 4.5 v, check vref for open or short to gnd. But, there is such a thing as too big when it comes to exhaust.
I'm Pretty Confident That Pressures Slightly Higher Than That Fall Within Specs Still So I Wouldn't Condemn A Cat Or Call An Exhaust Restricted If The Numbers Were A Couple Psi Higher.
This point is marked along the line of the increased back pressure. D = inside diameter of pipe in mm. On some vehicles under heavy load the back pressure reading may go as high as 5 psi.
Even Gm, Probably The Most Outspoken Carmaker Regarding Backpressure Testing, Suggests Different Readings Throughout Its Carline.
Discussion starter · #1 · dec 6, 2011. To find out engine exhaust back pressure we are using the following formula: However, the pumping loss will be increased.
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