What is the trouble code for an EGR valve?
Trouble Code 32 indicates that the Exhaust Gas Recirculation ( EGR) valve diaphragm is not where the ECM expects it to be. The ECM controls the diaphragm with a Pulse-Width Modulated (PWM) waveform. The EGR has a vacuum bleed solenoid that adjusts the vacuum applied to the EGR valve based on this pulse width.
Can a bad EGR valve cause a vacuum leak?
An EGR valve can become faulty in two ways; it can be closed all the time or open at all times. It could also remain clogged by carbon and debris. 1. If the valve sticks open When an EGR valve is an open position, it creates a vacuum leak. The leak results in incomplete combustion, which usually causes hesitation and rough idling.
How does the fuel injection computer regulate the EGR valve?
The fuel injection computer is the one that regulates the opening and closing of the EGR valve thru’ the application and release of vacuum (through a vacuum solenoid). One side of the EGR vacuum solenoid (the one that has only one vacuum inlet port) connects to the vacuum port labeled with the letter J on the throttle body.
How does the PCM open the EGR valve?
On throttle application, the EGR valve will be commanded open by the PCM as needed. The PCM waits for many conditions to be met before running the EGR test.
What are the symptoms of a failing EGR valve?
What are the symptoms of a failing EGR valve? A faulty EGR valve can cause problems with the flow and operation of the EGR system leading to performance issues including a reduction in power, reduced acceleration and decreased fuel efficiency. It can also cause vehicle emissions to increase.
How does EGR work on a third Gen F-body?
Once the throttle is closed, ported vacuum is lost and the valve closed. Most Third Gen. F-bodies use the basic diaphragm EGR valve, but instead of relying on ported vacuum, it relies on vacuum that is allowed to pass through a solenoid. The solenoid is controlled by the ECM.
Why do people like to disable code 32 ( EGR )?
If all else checks out, get a rifle cleaning brush and a shop vac and start cleaning. You will be surprised the amount of carbon chunks that will come out of there. Other notes: Most people like to disable the EGR because they claim that hurts performance. In actuality, disabling the EGR can hurt performance. Here is why.
The fuel injection computer is the one that regulates the opening and closing of the EGR valve thru’ the application and release of vacuum (through a vacuum solenoid). One side of the EGR vacuum solenoid (the one that has only one vacuum inlet port) connects to the vacuum port labeled with the letter J on the throttle body.