Recent content by UZ4runner

My 1uzfe out of a 93 LS400 failed emmissions at idle (590rpm). The max allowable Hydrocarbons is 220 PPM and 1098 was read. CO was measured a 0.54% (1.2% max allowable) The high speed (2500rpm) test passed at 173 PPM HC and 0.75%. Any Ideas what could be causing this?:confused: Info: 1...