James Wingfield Posted February 11, 2009 Report Share Posted February 11, 2009 I'm struggling to get a consistant fuel mixture on my mr2 turbo at the moment and have looked into some logged data to try to find the source of the problem. I've logged a constant load - constant speed run which was completed in one cell of the fuel map and looked through the results. I ended up with my WB reading almost a whole AFR variation over a 10s run. What's odd is that the recorded data shows that the fuel correction factors were all constant (unless I've missed one) and the fuel table was constant to within 1 or 2% yet the mixture still varied significantly. Further investigation let me to plot an X-Y scatter graph of the fuel table value vs. injector pulsewidth and I find there is no corrolation between the two. This was very confusing?! Is it possible to find out the equation used by the ECU to calculate pulsewidth based on the other inputs so I can check to find where the delta is coming from? I can supply the .txt log file if required... Thanks, James Quote Link to comment Share on other sites More sharing options...
martin battye Posted February 23, 2009 Report Share Posted February 23, 2009 check accel/load enrichment settings Quote Link to comment Share on other sites More sharing options...
James Wingfield Posted February 26, 2009 Author Report Share Posted February 26, 2009 I've checked all of the enrichment factors I could see. From memory: accel fueling IAT fueling post-start warm-up closed loop lambda fuel temp correction These were all set to zero (except the IAT which was about 3%. I've accounted for that in the final pulse width though). James Quote Link to comment Share on other sites More sharing options...
Guest Dave Posted February 26, 2009 Report Share Posted February 26, 2009 send through your pcl file and the log and i will have a look Regards David Heerdegen [email protected] Quote Link to comment Share on other sites More sharing options...
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