Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Good afternoon and welcome to JustAnswer!!My name is ***** ***** I have worked for a Chrysler-Dodge-Jeep dealership for 19 years and I will do my best to help.
TURBOCHARGER EXHAUST BRAKE FUNCTION -The VGT works in conjunction with the engine and transmission to provide an integrated braking system used to help slow the vehicle. This is commonly called exhaust braking. This braking power is achieved by modulating the turbo sliding nozzle ring to restrict the flow of exhaust gases from the engine, which in turn creates a high back pressure on the engine. The high back pressure creates a high level of resistance to the motion of the pistons within the engine and this resistance is used to reduce engine speed and thus vehicle speed.The exhaust brake feature will only function when the driver turns the exhaust brake switch to the on position. Once the switch is in the on position and the vehicle is moving faster than 8 k/h (5 MPH); the exhaust brake will automatically operate when the driver removes pressure from the throttle pedal allowing the engine to see 0% throttle and 0 fuel delivery.Exhaust braking is most effective when the engine RPM is higher. The automatic transmission has been programmed to downshift more aggressively when the exhaust brake is enabled to increase brake performance. Use of automatic transmission Tow/Haul Mode improves interaction between the engine and transmission. Inputs to the exhaust brake feature include:· Coolant temperature· Ambient air temperature· Exhaust manifold pressure sensor· Throttle Position Sensor
We (dealership) clean them all the time and it will not hurt the VGT.
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Bob if your exhaust brake will not work you will need to monitor it with a scantool and if the VGT is getting the signal then you will need to replace the turbo and have the ECM updated to the latest software..
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