Where is the EGR vacuum solenoid located?
It is normally attached to the engine block with a nut and is close to the EGR valve. The solenoid can be located by following the rubber vacuum hose from the EGR valve on the back of the engine block to the solenoid. Replacing the EGR solenoid can be done in just a few minutes and you can save time doing it yourself.
What is a EGR vacuum solenoid?
Its purpose is to recirculate exhaust gases that have exited the engine, back into the intake manifold so that they can be reburned. The EGR solenoid is controlled by the engine computer, and activated at very specific times in order to achieve the best performance, efficiency, and emissions from the engine.
How does vacuum solenoid work?
Solenoid valves consist of a coil, plunger and sleeve assembly. Once the solenoid coil is energised, the resultant magnetic field raises the plunger, enabling flow. When the solenoid coil is energised in a normally open valve, the plunger seals off the orifice, which in turn prevents flow.
What happens if your EGR valve is blocked?
When the EGR passageway becomes blocked off it keeps exhaust emissions and air from circulating in the engine, causing a suffocating condition. The engine idle will be rough, frequently stumbling and unable to hold a steady idle rpm. The rpm may be sporadic, raising and lowering randomly.
What happens if EGR is stuck closed?
rough unstable idling and stalling are some of the symptoms of an EGR valve that is stuck open. Is that correct? The temperature in the air increases if the valve is stuck closed or the exhaust gas recirculation system is not working. This could cause pinging and light acceleration.
Does EGR need vacuum?
Apply vacuum directly to the EGR valve using either a hand vacuum pump or scan tool depending on the type of EGR valve. If there is no change in idle quality, then either the EGR valve is faulty or the passages are completely restricted. Inspect the EGR passageway in the manifold for clogging and clean if required.
