AKUP is a Export chip/bin, it's Open Loop and I've tried to make it go CL...
Try ATPZ or ATPY. Then you will go CL and get some BLM numbers to work the VE table.
AKUP is a Export chip/bin, it's Open Loop and I've tried to make it go CL...
Try ATPZ or ATPY. Then you will go CL and get some BLM numbers to work the VE table.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
Thank You Eagle!
Hi Eagle, with the 7747 ecm, is there a way to datalog a wideband as the 7730?
Never have figured a way to do WB in same log...
I use Innovate data logger and IIRC you can combine that data log and a TunerPro Data log and use it in Excel...
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
thanks... i will take a look into it... I seen a thread where you and a few others were talking about it and the only real idea was using a voltage divider on factory NB input
Hi Eagle,
Can I ask a few questions???
I know BLM and INT are some what related, but im not quite understanding it. Correct me if im wrong but I understand BLM to be a measure of how lean or rich the engine is running and used that data to trim fuel. Int i thought was very similar but in the DL's i see the two on the graph sometimes mirror one another than other times they seem to be mirroring one another but in different directions. for example BLM could be 124 while INT is 133.
On Tuner Pro, the Stoich Afr scaler, I take it if i move that setpoint it will try to control the engine at what ever you set, and how much power or how much error correction does the 02 senor have?
Thank You
I made a voltage divider and tried this. The datalog only read 13.9 AFR (approximately .443 volts), no matter what how much the AFR on the controller varied. Its like the ECM was ignoring the voltage input and used .443 volts for everything. Maybe it has something to do with forcing the ECM into open loop.
I didn't get a lot of time to mess with it. Maybe today I'll go out and play with it.
Last edited by mmigacz; 04-18-2014 at 02:55 PM.
1986 ski centurion boat, 351W, gt40P heads, edelbrock performer rpm, 1227747 ecm, 72 lb/hr injectors (@18 PSI fuel pressure), .490/.490 lift, intake 278 duration, exhuast 282 duration, 112 lobe separation
1969 camaro, 355ci, performer RPM intake, camel hump heads, 1227747 ecm, 454 throttle body (@18 PSI fuel pressure),
2016 Chevy Cruz
2014 Chevy Silverado
Loaded up the Ostrich with the ATPY and all was well, except for one thing. Evidently this bin uses an open loop at idle regardless....
Off to search and figure out how to change that. At least now I can get started with everything else.
Thread resurrection.
Mark, can you expand on this a little bit? I just found this post after scratching my head for a few days trying to get the AKUP bin to go into closed loop on my Ford big block.
I thought it was my unheated 02 sensor, which was pretty old anyhow so I replaced it with a 3 wire and got between 880-920 mv at idle, but it never did go into closed loop after fully heating up.
Thanks,
Dave
Most export bins are set to be open loop all the time, since many places still use leaded fuel that destroys O2 sensors.
Though I haven't used the specific bin cited here, it seems that simple adjustments of certain scalers that should make it go closed loop don't seem to be effective, so the best option is to start with a bin that will go closed loop.
The man who says something is impossible, is usually interrupted by the man doing it.
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