nano Posted February 10, 2015 Share Posted February 10, 2015 Hi i have stock écu with td04.stock fuel pressure. Afr is 15 on low boost but at idle it goes to 13. Why causes this? I had fuel pressure régulator i thought it was this that causing that so put back oem system.thanks Quote Link to post Share on other sites
mikey4410 Posted February 10, 2015 Share Posted February 10, 2015 possibly ure engine temperature sensor Quote Link to post Share on other sites
nano Posted February 10, 2015 Author Share Posted February 10, 2015 You mean intake air temperature sensor? I have it connected in intercooler piping after throttle body. May it be cause of this? Quote Link to post Share on other sites
mikey4410 Posted February 10, 2015 Share Posted February 10, 2015 nope I don't mean that. Quote Link to post Share on other sites
nano Posted February 10, 2015 Author Share Posted February 10, 2015 So what is engine température? I checked error code. And there is code 24 : iat sensor Quote Link to post Share on other sites
teta Posted February 10, 2015 Share Posted February 10, 2015 http://www.megamanual.com/afrtable.GIF Quote Link to post Share on other sites
JayJ Posted February 11, 2015 Share Posted February 11, 2015 error 24, iat sensor = intake air temp sensor. And surely idle afr should be 14.7-16, not 13.5 as the table shows. Quote Link to post Share on other sites
teta Posted February 11, 2015 Share Posted February 11, 2015 http://www.safrtool.com/SAFR-AFR-values.asp Quote Link to post Share on other sites
JayJ Posted February 12, 2015 Share Posted February 12, 2015 (edited) On 2/11/2015 at 6:48 PM, teta said: http://www.safrtool.com/SAFR-AFR-values.asp nano has stock ecu, so it should idle at 14.7. Your link offers targeting values for standalone ecu with naturally aspirated engines. Edited February 12, 2015 by JayJ Quote Link to post Share on other sites
teta Posted February 12, 2015 Share Posted February 12, 2015 On 2/12/2015 at 7:11 AM, JayJ said: nano has stock ecu, so it should idle at 14.7. Your link offers targeting values for standalone ecu with naturally aspirated engines. ok that why im seeing these values cheers Quote Link to post Share on other sites
nano Posted February 12, 2015 Author Share Posted February 12, 2015 Can a bad iat cause rich idle? Is this common? When engine is cold afr is 11.5 i used to get 13.7 at cold start Quote Link to post Share on other sites
Ollieh17 Posted February 12, 2015 Share Posted February 12, 2015 Mean did this and never got to the bottom of it Quote Link to post Share on other sites
JayJ Posted February 13, 2015 Share Posted February 13, 2015 On 2/12/2015 at 4:50 PM, nano said: Can a bad iat cause rich idle? Is this common? When engine is cold afr is 11.5 i used to get 13.7 at cold start Yes, it's a one of the sensors used to control AFR Quote Link to post Share on other sites
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