TT Paul Posted August 15, 2011 Share Posted August 15, 2011 right noticed the car running abit richer than normal cruise sits around 14.7-15.2 was fine on way to pod and on strip but now car spec jspec tt, AEM fic,550cc injectors, full bpu,hybrids, and aem afr on 2500rpm 60 mph on cruise 14.5-14.9 take foot off goes to 12,13s on AFR gauge then upto 17 and over. seems tobe running richer checked hoses etc... no fault codes any help please thank you Quote Link to comment Share on other sites More sharing options...
imi Posted August 15, 2011 Share Posted August 15, 2011 12-13 doesnt seem too rich to worry about. I am assuming that it reads 17 momentarily when you lift off, if so then that is normal. Quote Link to comment Share on other sites More sharing options...
TT Paul Posted August 15, 2011 Author Share Posted August 15, 2011 yes dude it does but it didnt do it before is this ok anyone know????????????? Quote Link to comment Share on other sites More sharing options...
TT Paul Posted August 15, 2011 Author Share Posted August 15, 2011 also changed o2 sensor and took aem out no different so is it ok just normal Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 15, 2011 Share Posted August 15, 2011 Sounds OK to me. Have you recently disconnected the battery or reset the ECU in some way? This clears the long term fuel trim map and can change the closed loop behaviour. Quote Link to comment Share on other sites More sharing options...
TT Paul Posted August 16, 2011 Author Share Posted August 16, 2011 cheers ian and thanks Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 16, 2011 Share Posted August 16, 2011 Turns out Paul had replaced his battery recently, Ian added in case anyone searched for this in the future Mine was once trying to idle at 17:1 and leaner all the time, it was a bag of spanners and wouldn't pass the MOT like that. An ECU reset, to my amazement, fixed it permanently. Must have had christ only knows what in the long term trim map, perhaps my car offshored it Quote Link to comment Share on other sites More sharing options...
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