Piston Engines (W/Single Or Dual EGR Valves)
WARNING: This page does not describe the selected car, but rather 234 other vehicles, including the 2018 Mazda 6, 2017 Mazda CX-9, 2014 Mazda MX-5 Miata, 2014 Mazda 6, and 2014 Mazda 5. However, it is still accessible from the selected car via links, so may be relevant.
- Check vacuum lines for correct routing. Disconnect vacuum hose at EGR valve, and plug hose end. Connect vacuum pump to valve. Start engine. Apply 6-10 in. Hg to EGR valve and hold.
- Engine speed should drop at least 100 RPM or engine should stall. Vacuum should not drop greater than one in. Hg in 30 seconds. Reconnect EGR vacuum hose.