O2 sensor, checked continuity between pins 3 and 4 checked out ok, put multimeter on pins 1 and 2 with 3 and 4 wired to battery and engine running, voltage between 0.9 and 1 with some fluctuation when racing the engine but I didn't see anything around 0.6 as it mentions the range is 0.6 to 1volt in the workshop manual. I've just took the car out for 10 mins, AFR had been ok during this time, rich on startup (12:1) and then settled around 14:1 with some fluctuation, got home and parked on the drive with the engine running and watched the afr gauge, idle rpm around 700, AFR was around 14:1 for about 30 seconds and then there was an engine note change and it dropped to 10:1, crept to 11:1 and stayed there, it was as though someone had flicked a switch.Įngine temp sensor at different temps with a multimeter and pretty sure it's ok.Īir intake temp sensor, again tested at different temperatures with a multimeter connected and pretty sure it's ok. I have the injector change settings set in the emanage blue 166 before 275 now so it should be trimming the fuelling to the injectors automatically. I had a supercharger on but I've temporarily removed it to diagnose this issue, my emanage blue was only adding fuel based on positive boost from the greddy 3 bar map sensor and as i'm no longer getting boost that shouldn't be the issue, I've double checked the map again and can also do a trace and see what cells it's in when having the issue and it's not adding fuel. My car has been running rich for a while now, I have an AEM wideband air fuel ratio sensor and gauge, after the car has warmed up it goes really rich like 10:1 or 11:1.Ĭould be my AEM kit is faulty but I don't think so as it's reading what i'm expecting sometimes.įuel filter was changed last year and I've only done about 2000km's since.