OBD 1.5 Tuning

[caffeine]

Two on boost and two off boost tables sounds awesome actually.

The engine I was thinking of is in my 94 S10 (2.2). I believe it sends a 2x signal from the ICM.

[mrogersmike]

Two on boost and two off boost tables sounds awesome actually.

The engine I was thinking of is in my 94 S10 (2.2). I believe it sends a 2x signal from the ICM.

X2 on the two on two off.

Drove the truck to work for the first time tonight. Man what an improvement over the old 3.1. Waiting on cam sensor to start logging. Should be in tomorrow. Off work till Friday after tonight so I should be able to get soon tuning done.

[robertisaar]

Two on boost and two off boost tables sounds awesome actually.

The engine I was thinking of is in my 94 S10 (2.2). I believe it sends a 2x signal from the ICM.

http://imgur.com/83zSoPH,YL8Uisr

second image is a bit more useful, but it has typical DIS system signaling from the looks of it. the module also produces a 1X signal, presumably for knowing which of the injector pairs to fire(1/4 and 2/3 are paired). so, it actually operates a lot like the early quad4 ICM. feed it bypass and EST signals and it produces what i assume to be a 2X signal. we can ignore the 1X signal it creates or maybe run it through a flip-flop(or in some other way, drop every other pulse) and create a cam signal out of it(since it will then produce 1 pulse every other revolution)?

making a 24X reluctor to keep that signal present might not be a bad idea, otherwise more code might need to be gone through and disabled. i'm almost certain i've found a flag to disable even checking the 24X circuit, but i've never tested it.

X2 on the two on two off.

Drove the truck to work for the first time tonight. Man what an improvement over the old 3.1. Waiting on cam sensor to start logging. Should be in tomorrow. Off work till Friday after tonight so I should be able to get soon tuning done.

even without a cam sensor it's doing that well? i've heard interesting things from people not running the cam sensor with this PCM, i've never unplugged mine to find out.

[mrogersmike]

[URL]

even without a cam sensor it's doing that well? i've heard interesting things from people not running the cam sensor with this PCM, i've never unplugged mine to find out.

It was a little funky at first with the idle but starts and runs great so far. If I remember right I read somewhere that the PCM uses the last known position and keeps using it. Recently I was helping a young guy out with his 4.3 blazer(95) and found he didn't even have the fuse in that ran his 02 heaters and cam sensor. So I figured it might work and has so far. It even runs in closed loop which I thought would not happen.

Edit Log for rodeoa.bin created by TunerPro.
************************************************** ************************
09/03/2014 00:24:06 Flag: MALF CODE 28 TRANS. RANGE SW. ERROR changed from Set to Not Set..
09/03/2014 13:36:14 Flag: B6 - set to skip some DE and TCC retard stuff (seems to be manual related) changed from Not Set to Set..
09/03/2014 13:37:40 Flag: Manual Transmission Select changed from Not Set to Set..
09/03/2014 20:46:42 Scalar: RPM Below Which EGR Disabled changed from 1200.00 RPM (0x30) to 6375.00 RPM (0xFF).

Changes made as of now. EGR will be plumbed in and re-enabled during the turbo installation at a later time. Range code 28 can be changed back as I was getting the code before I saw the manual select.

[mrogersmike]

Cam sensor installed, diy tach generator hooked up, works only to 3250 though, started logging. Seeing some anomalies like spark advance is going off the scale, knocks are in the 200's at times and so far I forgot all about the VSS. Found a couple minor mechanical issues as well. For some unkown (well at least according to my son) reason it's all over the road at speed (which is 80 around here). Hopefully tonight I can take a closer look at the logs and see what's up. Maybe I can get some progress to a descent tune tomorrow.

[mrogersmike]

Haven't forgot about this. Had to work 16 days straight @ 12 hrs a day. Didn't get much sleep or much done. Mechanical issues are taken care of and VSS is working good. No more stalling or running lean in weird places. I hope I can finally get a decent log now.

I thought I might have seen a table or two that could be used to add spark and fuel with a 2 bar map, but they're not what I thought after a closer look. I may throw the 2 bar on it just to log the differences for fun, if it will even run. Anyhow, I'd like to drive it and get some miles and tuning in before the turbo add so I can get a baseline. I have to build the plumbing anyhow. I have two turbo's to choose from, a smaller one with an internal waste-gate and a large one with an external. I'm thinking I may buy one better suited to the engine size depending on cash flow. I'm not really looking to push it past reliability so maybe a 5-6 psi boost is really all I need/want.

[robertisaar]

i think if you throw a 2-bar on it without changing anything else, you're not going to be very amused. a lot of extra advance and nowhere enough fuel will be delivered, causing some really interesting issues just idling, let alone driving.

with table changes..... well, you would need to change a LOT of tables, nearly every one that references MAP or airflow will now need to be significantly altered to keep everything in check.

[mrogersmike]

log and bin done

Well....as promised, here's the tune I have to date. Sorry it took so long.

I should warn you the log is loooong. It's also a xdl zipped.

It has taken me some time as my learning curve was alot steeper than I figured. I have also edited the adx some but only to the point it made it easier for me to use. I plan to add a little more advance and slightly more Main VE refinement although this is pretty close as is. Highway mode is enabled and actually works according to the log.

My truck is a 5 speed manual and I live in a hilly area. Some of the log is on the Interstate where the most improvement was apparent. I no longer need to hold the pedal to the floor to get up the long hills to town and back while still losing speed.

If you see something amiss, I would be grateful for any help.

[robertisaar]

i take it you live a bit above sea level? barometric pressure never gets quite to the 90 range.

I'm not seeing any knock, at least. fueling is there for the most part. the way you have highway fuel setup needs fixed; the entrance speed should be higher than the exit speed otherwise the code might act funny.

i would have started with a different BIN as well.... or perhaps swap the T-side from a f-body manual calibration in. if you have any weird drivability issues, that could still be done. kind of like how segment swaps are done with certain OBD2 applications.

[mrogersmike]

OOPS, I did forget to mention a couple important things. I do live at about 4200' above sea level. Also, my VSS reads about 10% slow in comparison to road speed.

Thanks for the feedback. I will fix the highway fuel.

The bin I ended up importing from the ECU if I remember right. In regards to the T-side, it might be helpful to hook up the clutch input as well as the p/n input, but I'm not having any drivability issues. It actually seems to be very smooth, and gear changes are really smooth. No stumbles or stalls or funny rpm increases or drops. I'm pretty happy with it so far. I found DE and DFCO to be helpful. However, I'll look into the F-body T-side.

I'm still thinking a turbo would be helpful(not too mention fun to do and drive) on the top end. Is the tune good enough(once highway fuel is fixed) to work with in regards to "on boost, off boost" tables? Is there something more I can do? I think this ECU is really simple to work with as far as tuning, but if it can't be done I won't be too disappointed in the performance it gives. I can always go with a 3.4 later if necessary.

[robertisaar]

vehicle speed should be able to corrected for.... do a search for road speed constant, should come up near the bottom of the scalars, multiply by 0.9 and that should bring reported MPH closer to reality.

if you think the fueling is close enough, it can be done. with no knock happening(or at least being sensed), that removes a huge concern of mine.

[mrogersmike]

Thanks for VSS info. Already fixed, as well as highway entrance and exit. Just have to flash to the ECU, tomorrow, it's too cold right now. Brrrrr

As for knock, I know that that I'm 3 degrees away from knock around 45-85 kpa/1800-5600 rpm. I know this because I took the time to find it by adding 1 degree of advance at a time till it showed up. Even then, it was only in one specific area which ended up being a typo of 1 degree more than the surrounding fields.

PE is somewhat rich because it seemed to respond better. I tried to lean it out but it fell on it's face. I found the stock settings to work best. With that in mind I tend to believe I will still be a bit away from knock.

The only concern I have is that every time I change gears up, I show rich (120-125 blm) in the 20-25 kpa range. DE I'm sure, but it works as is. Being as this is a little rich, I'm comfortable with it.

Hope this helps.

[robertisaar]

if the engine likes it, run it.

temporarily running rich after lifting off of the throttle for a shift is going to be a DE-caused issue. if it stays rich in the same conditions, then the VE table needs played with. my only concern with that is what happens once you get back on the throttle.... depending on how your BLM cells are setup, you'll either jump into a different cell that already has a roughed-in BLM(and fueling will be back on track near instantly) or you'll stay in the same cell with the condition that caused the PCM to lean out the mixture a bit.... and I really couldn't say if the portion of the VE table you would be coming back into continue to need that enleanment to maintain stoich or if it actually sends the engine a bit lean until the O2/PCM catch up to what is going on.

[mrogersmike]

I'll look at my logs to see if I can tell if it goes lean after the shifts tomorrow. I have to go to work tonight yet, it seems people still want electricity on Christmas.

I assume this could be a problem with turbo boost coming in immediately after a shift while the ECU starts going lean to compensate for the rich DE. If I find it is, I will make the corrections to DE, log it, and post a revised bin.

Thanks for everything, and Merry Christmas!

[mrogersmike]

Logs show it's definitely going lean after the shift. Really lean. So I have made a change in the DE vs Map table and see if that helps. I'll let you know when I get it right.
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