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Anybody got any clues, by any chance? Otherwise the car is off to car heaven soon. Many thanks, Richard

Folks, Need some help. We have a 2003 RX300, 175k miles. A few weeks it starts running rough, not allowing revs to go above 3000rpm and generally spewing out loads of fumes. It also loses the outside temperature reading, on the same day - reads '--'. The local garage say the two are not related, and that the error code reads AFM sensor. They replaced this to no good effect. Specifics: 1. Will not start on first turn but does thereafter 2. Runs very rich 3. When you try to rev over 3000 it feels like a major misfire 4. Outside temp not reading 5. No power to outside temp sensor 6. Sensor resistance does change with hot & cold water so probably not the sensor itself. 7. The fuses under the bonnet all look OK - are there any others? Any help and advice would be gratefully received. Many thanks, Richard