How do I data log without having it increase idle?
Thread Starter
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
How do I data log without having it increase idle?
I'm trying to data log so I can tune my idle and every time I plug in my cable it idles at 1000 RPMs. Target idle in the tune is 900 and I can't see what's happening at 900 when data logging. My cable has 4 different terminals on the USB plug and a little metal tab that connects 2 terminals at a time. How can I data log without having the idle increase? Thanks!
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The idle increases because the cable is putting the ECM into "10K mode". That means that the A&B pins of the ALDL connector are bridged with a 10,000 ohm resistor. Some cables have a switch so you can disconnect the 10K resistor. My Diacom cable does it through the Diacom software, but that's not normally the way it's done. Diacom uses a parallel port and has more control over what the cable is doing.
10K mode sets the idle speed to 1000 RPM, messes with the timing and a few other things. It's all spelled out in the shop manual.
10K mode sets the idle speed to 1000 RPM, messes with the timing and a few other things. It's all spelled out in the shop manual.
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
I'm trying to data log so I can tune my idle and every time I plug in my cable it idles at 1000 RPMs. Target idle in the tune is 900 and I can't see what's happening at 900 when data logging. My cable has 4 different terminals on the USB plug and a little metal tab that connects 2 terminals at a time. How can I data log without having the idle increase? Thanks!
Thread Starter
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
I use tunercat, I would have to see if tunerpro has this function as an option, it is called ALDL spark adder in Tunercat. If you do not have this option send me your bin and I can eliminate it and send it back to you.
