In diagnosing a 1994 Toyota 4Runner, one must perform a test to allow easy answers to direct the diagnostic path.
To diagnose a 1994 Toyota 4Runner that failed a state emissions test for high N0x, a technician must follow the same testing logic of later OBD II vehicles and must verify converter operating and everything.else, according to an article in the February Professional Tool & Equipment News. Read how to proceed..
