Raise in Idle When Datalogging

dylans · Post by **dylans** » Tue Mar 03, 2009 5:45 pm

I have wired in a switch for the on-board datalogging, The switch goes into the B5 Air Conditioning Switch on the ECU. The on-board datalogging works great, my only problem with it is that everytime i flip the switch to on to start datalogging, it raises the idle from around 850rpms to about 1050rpms. Is this due to it being connected to the A/C port and his the ECU raises the engine RPM when it is activated, it does the same thing for the datalogging? Is there anyway that I can get rid of it so that my engine idle doesn't increase when i use the switch to activate the datalogging? Car details are below and I attached a datalog where i didn't have the switch activated and then I activate it so you can see the raise in idle. Thank you.

-Dylan Smith

Car:
1996 Honda Civic DX
B18B Engine

Post by **Hondata** » Tue Mar 03, 2009 6:52 pm

Yes, it is because the AC switch is increasing the idle speed. I've fixed this for the next release.

dylans · Post by **dylans** » Tue Mar 03, 2009 10:25 pm

Great! Thank you...any idea on eta for the release of the new version?

darknight · Post by **darknight** » Wed Mar 04, 2009 2:20 am

I have run into this issue as well and the only way to solve it is to use an alternate pin. I have always either used the service indicator pin or the power steering pin.