Any plans on porting this mod to the 94170015 ROM?

 

Just started a dialog with tephra to see if he wants to add it to his next set of ROMs.

 

I loaded this patch today and with stock (14.7) target at idle, the car seems to be running as normal from the front O2.

I will be testing different target AFRs for idle soon and will post results.

Very good work!

 

After fixing my wiring problems and breaking the sensor in there was a slight change in what should be added to b/L. This is a log of a 30s smooth highway cruise. Only changed bL/ml by about .8, so no biggie there. Attached are the new figures and I updated the comp sheet from my other post with the adder...


http://thefrost.net/randomfiles/Open...eband_Comp.xls
http://thefrost.net/randomfiles/tuni...Sim_update.xls

 

Not sure what I'm looking at. Does this show the AFR drifting up/down when it shouldn't?

 

Nope, this is just a slight comparison for the AEM wideband guys showing the diff between the analog signal and the serial value. This is purely just to get a more "accurate" (rather, better range) for the calculated values (assuming that serial is exact and analog may be affected by interference of some kind).

Obviously each sensor my be slightly off and each person, for each new sensor, should probably take a log and compare.

The diff graphs just look silly because they are sorted to make it easier to find the outliers. Originally they looked much more like the quoted picture.

The fact that they are only about .12 AFR off is no big deal... I was just trying to make sure there wasn't a .3 or so difference in case I was trying to cruise at 17 AFR (E85) and winding up much leaner than that. I figured since I had the data I may as well adjust bL and make it available

 

Ah, so its the difference between the reading from the wideband serial via EvoScan and from the analog out?

 

You got it, and analog is leaner in general.

MRFRED, I had a slight problem running lean on warmup (just for the first minute or so of driving) that seemed to get slightly better with updating the startup IPW values. It seems to be back/slightly worse with this mod, though not to a knocky level right now. I was under the impression that the 14.7 I set for warmup was carried over all of the cruise cells as well as the idle cells until the temp that is set... is it only idle though?

Note, this is only at the instant that I start pushing the throttle down, if the pedal movement is at a standstill on warmup the a/f seems to stay in an OK stoich range.

 

The warmup afr is indeed global, so it covers the full range of closed loop rpm and load.

The closed loop wideband mod wouldn't directly affect tip-in AFR, but I suppose that the small increase in closed feedback lag could allow a momentary lean condition if your car has a tendency to go lean on tip-in when cold. I haven't experienced this with my car though, and my sensor is all the way at the end of the DP, but my car tends to go rich on tip-in. What kind of tip-in response do you get if you force open loop?

 

I'll have to check and get back to you on that if I can get a minute. I'm not sure if you are specifically referring to on-warmup or after warm, but I'll try to get both. Someone else was describing a similar problem in that thread though...

 

I tried this patch again and everything is working. I just started over and re-copied all the data to the map and re-flashed the car and it seems to work so far. I have only confirmed that idle is fine but I will try driving it today to confirm that cruising and light throttle is also good.

 

Good to hear.

 

Did some more testing with the patch and it is working fine under cruise and throttle transitions.

Thanks

I do however, seem to be having a problem logging MUT 19 which should now be the voltage coming in to the old 02 sensor pin on the ECU correct?

I have wired my meth injection flow sensor up to this wire and the readings are not what I expected. Maybe its something simple that I am doing wrong.

With Evoscan I am logging request ID = 19 and Eval = x which should give me the raw voltage of the flow sensor. However it is giving me reading of 28 when the voltage is .45 and then a reading of 130 when the voltage steps up with flow of meth.

Any suggestions?

Just thought about this some more, is it on a 0-255 scale and not simply voltage output. I.E 5 volts = 255, because then the data makes more sense.

 

FYI I just took a 400 mile road trip and averaged 22mpg with this patch on E85! I'd been down in the 17-17.5 area as of late.

Thanks Mrfred!

 

Glad its working well for you. Can you post up the fuel table that you used for that road trip?