Buy 1990 Mazda RX-7 PCV Valve. 323, Protege; SOHC. 626, MX-6; 4 Cyl. Miata MX5. MX-3; 1.6L. Protege May, Dipstick, Engine - OEM Mazda Part # B54113890A (B541-13-890, B541-13-890A, B54113890, USEB54113890A)

Valve, PCV.
PCV Valve.

PCV Valve

Fits 323, 626, CX-5, MIATA, MX-3, MX-6, Protege, Protege5

323, Protege; SOHC. 626, MX-6; 4 Cyl. Miata MX5. MX-3; 1.6L. Protege. Protege; 1.5L.
PCV Valve - Repair or Replace
If your PCV system is malfunctioning, you may notice any of several symptoms: if your tailpipe smokes or your engine idle speed is high or erratic, the PCV valve or its associated parts may need service. You may also notice that the dipstick in your 1990 Mazda RX-7 won't stay in the dipstick tube, or that your oil cap hisses as the engine is running.