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 Post subject: larger injectors and strange CL/OL behavior
PostPosted: Fri May 06, 2016 7:40 pm 
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Joined: Tue Jul 13, 2010 2:16 pm
Posts: 12
Car is e-tuned and runs great, but was pushing the limits of the stock injectors on my '04 WRX 4EAT. Upgraded the injectors to the dark blue 565CC ones. Adjusted the latency and scaling in the map and while I need to dial in the fueling, it's not too far off. The strange thing is that when I'm on part throttle and hold it right around 3K RPM, the car surges a bit and when logging I see it going in and out of CL/OL. I can reproduce the behavior easily and if I'm above 3K RPM it doesn't happen at all. No idea what would cause this. Any other tables I should look to modify as part of the injector upgrade? Any suggestions for troubleshooting? Thanks!!

Code:
Time (msec)   CL/OL Fueling* (status)   Engine Load (Calculated) (g/rev)   A/F Sensor #1 (Direct)* (AFR)   Mass Airflow (g/s)   Throttle Opening Angle (%)   Engine Speed (rpm)   Fueling Final Base* (estimated AFR)
13434   10   2.14   11.3   104.91   30.2   2936   11.57
14053   8   2.02   13.73   98.8   27.45   2928   14.47
14115   8   2.05   14.8   95.62   27.45   2798   14.43
14162   8   2.08   15.8   95.36   27.45   2747   14.69
14209   8   2.08   15.09   95   27.45   2790   11.8
14255   8   1.99   14.64   92.44   27.45   2790   11.84
14302   10   2   13.35   94.83   27.45   2845   11.91
14879   10   2   13.35   94.83   27.45   2845   11.91
15386   8   2.01   14.54   95.36   27.45   2902   14.71
17398   10   2   13.35   94.83   27.45   2845   11.91
17968   8   2.11   14.76   95.62   27.45   2719   14.67
18014   8   2.05   14.54   90.67   27.45   2658   11.68
18077   8   2.05   14.18   90.45   27.45   2621   11.69


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 Post subject: Re: larger injectors and strange CL/OL behavior
PostPosted: Fri May 06, 2016 8:30 pm 
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Joined: Sat Jul 06, 2013 12:55 pm
Posts: 3297
Location: NI
should be a cl/ol transition table based on injector pulsewidth - with the larger injectors using less IPW than before maybe it's something your only seeing now?

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Good luck and may the logs be ever in your favour!


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 Post subject: Re: larger injectors and strange CL/OL behavior
PostPosted: Fri May 20, 2016 12:12 pm 
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Joined: Tue Jul 13, 2010 2:16 pm
Posts: 12
That fixed it! At least so far. In all the reading that I ever did with regards to swapping injectors, I never recall anyone talking about adjusting that table as well. Such a simple change too. Thank you!


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