Guest |99| Posted August 5, 2009 Report Share Posted August 5, 2009 Can anyone offer some advice on the following: Crusing on light throttle (Nom. 2000RPM, MAP < 80kPa). When the radiator fan/s come on there is a short term lean out of about 1.0 AFR and then the AFR recovers back to the nomal range within about 3 sec. I am not concerned about the lean out causing damage as there is no load, however it does cause the engine to hesitate giving a gittery ride. The idle adjustments work fine as the engine picks up when at idle and does not stall etc. It is only at light throttle positions. I have looked at the transient MAP response but nothing is picked up. Any suggestions?? Quote Link to comment Share on other sites More sharing options...
Guest |59| Posted August 6, 2009 Report Share Posted August 6, 2009 Is your battery compensation table for injectors set up correctly? Is battery voltage stable? Quote Link to comment Share on other sites More sharing options...
Guest |99| Posted August 6, 2009 Report Share Posted August 6, 2009 I have logged the "12V internal supply" and it is steady at 11.88V. I will log the "AUX 9/10 supply" assuming that this is the actual battery voltage and see if it changes. Quote Link to comment Share on other sites More sharing options...
Guest |99| Posted August 6, 2009 Report Share Posted August 6, 2009 Does anyone have a reference for the SARD 650CC side feed injector latency at various battery voltages?? Quote Link to comment Share on other sites More sharing options...
rayhall Posted August 6, 2009 Report Share Posted August 6, 2009 I just did a Google search and came up with this...Latency Time = 1.5 Not much help as they do not give you a voltage. Ray. Quote Link to comment Share on other sites More sharing options...
Guest |304| Posted August 6, 2009 Report Share Posted August 6, 2009 Here is a useful link I found for injector dead times: http://injector-rehab.com/kbse/lag.htm Quote Link to comment Share on other sites More sharing options...
Guest |99| Posted August 6, 2009 Report Share Posted August 6, 2009 Thanks flyrdm. I have used that site before but it does not have the right SARD injectors (high resistance type) Logging of the battery voltage shows that there is a drop of about 2 VDC (13.8 to 11.9). I have increased the injector dead time a bit down at these voltages and it has helped. It looks like just a bit of fiddling will get me there. Quote Link to comment Share on other sites More sharing options...
rayhall Posted August 6, 2009 Report Share Posted August 6, 2009 You can send an injector to http://www.yawpower.com in the USA and they will give you the values and a lot more data on the injector. Ray. Quote Link to comment Share on other sites More sharing options...
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