robin Posted June 16, 2011 Share Posted June 16, 2011 The car (UK supra) has been running rich for some time and in an effort to resolve it I have replaced the water temp sensor and both o2 sensors and seen the mpg improve from about 16.0 mpg to 18.7 mpg however the car is still running a bit rich. Most noticeably when cold/warming up and on a steep hill you can end up with a fair bit of turbo whir but very little happening and the engine wants to die as you pull up to a stop and I can smell fuel. The situation improves alot when its warm but it is still a little rich. Does anyone have any other ideas on what I can try in an effort to resolve the issue? No error codes are being logged at all. Quote Link to comment Share on other sites More sharing options...
Ian C Posted June 16, 2011 Share Posted June 16, 2011 Check and clean your air flow meter Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted June 16, 2011 Share Posted June 16, 2011 Also check the IAT sensor. Quote Link to comment Share on other sites More sharing options...
robin Posted June 16, 2011 Author Share Posted June 16, 2011 Whats the best way to clean the air flow meter? Is it a wire type or flap on the UK? I'll give the IAT sensor a look. Thanks guys! Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted June 16, 2011 Share Posted June 16, 2011 I have cleaned AFM hot wires with a very soft artists brush with methylated spirit, or you can use spray contact cleaner (carefully!) IAT sensor from memory is a resistance check, will try and find the figures later, the IAT will most likely have more effect when cold and during warm up, and much less effect once running temp. Quote Link to comment Share on other sites More sharing options...
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