How to check for vacuum at the EGR valve?
If you have a scan tool capable of controlling actuators or pids you can command the EVR on and check for vacuum at the EGR valve as the regulator opens. If you do not notice vacuum at the EGR valve as the EVR is commanded on and you do have supply vacuum at the EVR connector then check the EVR,…
How many wires are in an EGR valve?
There are 5 wires sticking out of the EGR valve’s connector, in this section we’ll explore what each one does. Most of the EGR valves will have the letters A thru’ E molded onto the EGR valve’s connector. I’ll be using these same letters for the circuit descriptions below: Ground circuit for EGR valve solenoid. Gray with Black stripe wire.
How is the EGR system controlled by the solenoid?
The EGR system is controlled by the EGR control solenoid. When the EGR control solenoid is activated, a passage is opened up that allows exhaust gases into the intake manifold.
What causes a fault in the EGR control circuit?
Usually a fault in the control circuit, will leave no noticeable symptoms other than the Malfunction Indicator Lamp (MIL) illumination. However, if the EGR control solenoid is stuck open due to debris, etc. the code may be accompanied by misfire under acceleration, rough idle, or engine dying altogether.
Where can I find the EGR valve on my car?
Or visit an auto parts retailer on the Web, and enter your vehicle information to look for the EGR valve. Many auto parts stores online keep a database of auto parts photos or images for many vehicle makes and models. You may find a picture of the EGR valve for your particular model.
The EGR system is controlled by the EGR control solenoid. When the EGR control solenoid is activated, a passage is opened up that allows exhaust gases into the intake manifold.
Do you need vacuum pump to test EGR valve?
Still, you can follow this guide along with the procedure described in your vehicle manual to test your EGR valve, if necessary. To apply one of the tests to the EGR valve, you’ll need a vacuum pump, which you can borrow-rent from a local auto parts store, if you don’t have one.
How does the ecμ control the EGR system?
Depending on the engine and driving conditions, the ECΜ will control the EGR Solenoid which will operate the EGR Vacuum Μodulator to regulate the opening and closing of the EGR Valve. The EGR system on recently built vehicles uses a step motor to control the flow rate of EGR from exhaust manifold. This motor has four winding phases.
If you have a scan tool capable of controlling actuators or pids you can command the EVR on and check for vacuum at the EGR valve as the regulator opens. If you do not notice vacuum at the EGR valve as the EVR is commanded on and you do have supply vacuum at the EVR connector then check the EVR,…
How do you remove the vacuum line from an engine?
Remove the vacuum line from the EGR valve (blue dot below). Remove the side-tube EGR bolts and, as much as you can, loosen the main EGR bolts (2 x 12mm, green dots). Break the tubes loose from the EGR. Move the engine forward, away from the firewall, to gain more access to the EGR. Continue to loosen the EGR bolts until they’re all the way out.
How do you remove the EGR valve on a Z32?
The other common method to removing the EGR valve is to cut the bolts at the rear of the engine. Spray all EGR bolts in PB Blaster and wait a day! Remove the vacuum line from the EGR valve (blue dot below). Remove the side-tube EGR bolts and, as much as you can, loosen the main EGR bolts (2 x 12mm, green dots).
Why do I not feel pressure on my EGR valve?
You should feel vacuum or a slight pressure on your finger tip, depending on the particular system type. If you don’t feel a change in vacuum or pressure, likely the problem lies with the circuit that provides vacuum or pressure to the valve. Reconnect the vacuum hose to the valve.