Need experienced eyes on EEHack log

I have just over 2K miles on a 94 Buick Roadmaster power plant swap into a 93 Saturn wagon. Engine and trans are stock with all new sensors, MSD 8.5 wires, fresh sonic cleaned injectors flow tested to original specs. New pressure regulator. 44psi with vacuum disconnected. Opti new with original Mitsubishi pickup and disc from original unit installed. Everything is working really well except for a slight stumble during cruise speed, at slow or fast conditions. (Light throttle apply to maintain speed.) I have been using Scan9495 and recently EEhack to work through the teething issues all projects tend to have. I'm hoping someone with more experience with this data can shed some light on what's going on. The data is from my morning and afternoon drives to and from work. City and highway conditions. The VSS data is 23mph faster than actual due to rear end ration and tire diameter. Thanks for the help and any info is appreciated. By the way, the car is an absolute blast to drive, 3100lbs with me and half tank of gas.

you have one bank consistently richer/leaner than the other but otherwise your logs look okay.

what bin did you base your tune on? a b-body bin is for a giant car with lots of momentum, your light little car might need different cruise timing, iac throttle/speed follower, etc.

What you see is the stock bin that's in the stock ecm. The light weight car situation was something I thought might require modifications to the tune. The IAC once in a while I believe is late when coming to a stop. The engine seems to load up for a couple of seconds then clears out. What would be your first move in a plan to make corrections to the tune?
I would like to increase the injector shut off speed limiter first!

Quote:

---

Originally Posted by Greezmonkey

… What would be your first move in a plan to make corrections to the tune?
I would like to increase the injector shut off speed limiter first!

---

If you correct your speedometer, your injector shut off speed effectively goes up.
I would not be surprised if other drivability symptoms change their behavior after you correct your speedo.

I'm getting ready to set up the Tuner Pro and would like to download the original bin from my computer using your new flashhack. I'd like to keep an original copy for backup of the bin and then start my changes to a second one for flashing back into computer. I've downloaded the flashhack and extracted it. What is the process to make and save a copy to my lap top? Since I drive the car daily I'd like to make changes and in the evenings then load the changes and check them out the next morning. Thanks again for your help. Trying to graduate from carb/points.

just try it before you assume its difficult and want to be hand held through it. it's one button, i worked really hard to make it easy

Quote:

---

Originally Posted by Greezmonkey

… The IAC once in a while I believe is late when coming to a stop. The engine seems to load up for a couple of seconds then clears out.
What would be your first move in a plan to make corrections to the tune?

---

The table 'IAC Adder Vehicle Speed - aka Throttle Follower IAC Offset vs MpH - depends on accurate figures for rear axle ratio and tire diameter, so, to reiterate, correct your speedo first.

Your right Steve it is easy to use once I unzipped it. Tried 5 times to get the bin info from the ECU and save it. When loaded to Tuner Pro there wasn't any data in the various maps or scalars. Also noticed that when saving the file it wasn't saved as a .bin file. Slowly getting there.

Quote:

---

Originally Posted by Greezmonkey

Your right Steve it is easy to use once I unzipped it. Tried 5 times to get the bin info from the ECU and save it. When loaded to Tuner Pro there wasn't any data in the various maps or scalars. Also noticed that when saving the file it wasn't saved as a .bin file. Slowly getting there.

---

You have to actually name it .bin yourself, yes.

As for loading in TunerPro, you did specify the correct XDF in TunerPro too, yes?

i'll fix that in the next version so it just uses the .bin extension, i realize it's an annoyance i should have fixed earlier.

I have been making some bin changes the last couple of weeks. Upgraded the speedo scalers to match the tire/rear end ratio. The areas of improved drivability that I'm striving for are the slow and fast cruise (steady throttle) smoothness. I'm still having surging at the slow and fast cruise. During cold start up before closed loop the steady cruise is fine but that only lasts for a little while. Second issue was as approaching a stop it would load up a little. I'd put it in neutral clear it and then back in gear and it was fine. I adjusted the IAC adder-vehicle speed, added 2 steps across the entire range. I adjusted the TPS IAC offset enable%TPS threshold vs RPM by 2. Not sure which one made the improvement but has been ok for now. Looking at the left and right BLM's i adjusted the individual cylinder fuel trims >0%TPS all to no trim, (1.00). Seemed to make the
blm's closer to each other. The surging issue seems to cause the TCC (lock up) to kick in and out as the timing retard makes changes. It can be seen during the data stream I've saved. I've attached the data stream and the bin I have installed. Once again thanks for the previous responses, any others welcomed. Getting closer with 3K on the project now.