2004 Hyundai Sonata GLS 2.7L V6 153K Miles.
Had a misfire back in October (cylinder 3)… took it to a local garage and they put new double platinum NGK plugs and wires in it (and did some other stuff)… Put over 1K miles on the car and all of the other diagnostics set except for these 2… No Check Engine Light, No Error Codes (I have my own OBDII basic reader and I’ve been checking it like every day)… I reset the diagnostics using the scanner and things went back to the same state with the diagnostics (02 test is reading ‘ready’)… Called the Hyundai Dealer and they said try idling the car first thing in the morning for 20 minutes… no change. Garage that did the plugs suggested doing the O2 sensors for 1K… so I put 4 new O2 sensors in myself for 200… put on 500 additional miles but still those 2 tests will not complete. My inspection is up at the end of December and I don’t know what to do. Hyundai dealer says to keep driving it that eventually it will throw a code or the tests will complete but I am running out of time (and they can’t tell me what the normal drive cycle mileage is. PA emissions test can run with one 1 incomplete diagnostic test but not 2 and I really can’t afford to go out and buy a car and a get car payment right now (esp after putting 1500 into it since October). My baby is in good shape otherwise… I just can’t get her inspected like this - AUTO FAILURE if I try.
Does anyone have any suggestions other than keep driving it and at some point maybe something will happen? It got over 125 drive cycles on it since the new plugs and 1500 miles… highway and city (including down and back to DC which is 130 miles each way) … even TRIED to do the OBD drive cycle and was almost run off the road based on those stupid specs of letting it coast to 0mph from 60!.. something is not right…it can’t be.