New Thermal Vacuum Valve Located On Left Fuel Rail. See #13 In Second Illustration. FITS 1988-1991 5.3 V12 XJS and 1985-1987 XJ6 This part will not be brown like the original it is the newer updated version and works perfectly. This valve flushes cool fuel through the fuel rail during a hot start. It prevents hard starting due to vapor lock. NLA EBC4600 (EAC5086)
