TOYOTA RAV 4 2000cc 3SFE TCCS 1994 SXA10 - High emissionsArchived Message
Posted by DC McCALL on July 19, 2004, 9:08 pm
HI ALL THIS VEHICLE FAILED MOT EMMISISIONS ON HIGH CO & HC CO CAN BE AS HIGH AS 9% BUT IS UP AND DOWN LIKE A BRIDES NIGHTY. O2 SENSOR IS STATIC SHOWING A RICH MIXTURE IF I INDUCE AN AIR LEAK THE O2 SENSOR RESPONDS AS EXPECTED. MANIFOLD VACUUM IS GOOD AT 20" BUT THE LIVE DATA SHOWS LOW VACUUM.MAP SENSOR READIING CORRECT VOLTAGE FOR VACUUM CREATED WITH A PUMP. WHEN IDLING VACUUM GAUGE READS 20 INCHES (67.7 KPA) BUT LIVE DATA SHOWS 39 KPA THIS COULD BE A WIRING FAULT OR ECM FAULT HAS ANYONE COME ACCROSS ANYTHING LIKE THIS