98 VCM able to go on SD to tune VE?

[98hc4mula]

I am following 69lt1bird write up to tune the VE table on my 98 formula but the PCM is not wanting to accept the file and its bringing an error code saying
"file does not match VCM hardware"
how can I fail the MAF and go onto SD in order to tune the VE alone? is this possible? Im attaching the tune I modified so you can see what I changed to go onto SD mode.
also here is a screenshot of the error code on HPT

[98hc4mula]

Can someone comment on this before I email support please.

[2xLS1]

Looks like you are trying to write a 99 F-body file to a 98 PCM. (you said it is a 98 Formula) You can't do that.

[98hc4mula]

How can you tell it's a 99 file? I used the same file I had from it previously and turned off maf. Cot. Ltft stft etc.... Where do you see that?

[2xLS1]

.....

[98hc4mula]

geeez man, I did not see that, I think I have messed them up a little bit when choosing a different file.
Ill copy entire and modify that one so I can do the VE tuning., Good catch, I appreciate it much.
Ill update this as I do the VE tuning

[98hc4mula]

ok now I have that going I loaded the new parameters to be on SD only to tune the VE but the darn scanner does not register my VE AFR error%
can someone look at the cfg and see if anything is left out please.
I am using a NGK AFX WB and thought to have all parameters where they need to be. Also uploaded the tune....the car runs super rich with how the VE is set up now. AFR is 10:1 at idle, I want to get this dialed but my scanner is not cooperating....help on this one please. Im learning as I go.
thanks
David

[edcmat-l1]

Doesn't look like you have your WB in there. Need to put that in the EIO inputs down at the bottom.

[98hc4mula]

how come I can see it on my end. its on the IEO #1 input. as NGK AFX WB...do you not see it? when I am logging I am able to see the AFR from the WB but the histogram dont load.

[98hc4mula]

none of the 3 VE AFR histograms load at all. not even the VE O2 sensors one.

[robbyredneck]

when you see your wideband on the scanner is it reading in afr or lambda? your trying to to plot sensors instead of pids.
you want to plot
100*(wideband-commanded afr)/commanded afr
this equals measured afr vs commanded i.e. afr error in %

make sure you have all in your table. as i am sure you have read. your getting closer and now you see the importance of the allmighty scanner. post a scan so i can see how your config reads it. i would suggest you use lambda but thats up to you.

[98hc4mula]

im posting the latest scan I just did. One thing I also noticed is that the histograms are only recording 20 Kpa, even though the car is running at 60 kpa....here is the scan so you can look at and see what you can spot.
I am not sure why is not plotting the data at the correct parameters.

i hope we can figure this out by tomorrow to work on the VE calibration.
I got the car to idle a little better but it is pig rich at most all RPMs on this VE settings.

also one more question: how do you tune the VE on the 4000-6800 RPM range? same as on the low end....just getting on it? wouldnt that trip PE mode?

im learning a lot as I do this. I see how this works but cant get the darn scanner to cooperate with me

[Russ K]

Delete the Manifold Vacuum pid from the table display, and replace it with the Manifold Absolute Pressure (SAE) (Kpa) pid.

Russ Kemp

[98hc4mula]

im going to go try this out tonight....I think this is it Russ....thanks a lot for looking at it.
now what do people usually do to calibrate the VE? do I go drive and hit as many cells as possible? even on the higher RPMs?

[blownbluez06]

Yes. I call it painting the VE. Vary your throttle throughout the entire RPM range as best you can, starting with # cell hits =0 then continue increasing the # cell hits and do more "painting" to fine tune it. After getting all of the low throttle data written, I also set a plot filter in the histo to prevent any decel data from hitting. [SENS.90]>18%
Choose whatever % throttle you like to prevent decel data from hitting.

[robbyredneck]

it's ok if it hits pe. i am confused as to why this was once considered a no-no . maybe old versions of hptuners did'nt have the ability to plot commanded data and then paste special, dunno. but if you have 12.5afr and that's what your commanding, you have zero error. if you take the pe or be factor out, you still have zero error.

[98hc4mula]

cool, it seems lke its working good. I have been driving part throttle under 4000 rpms now I need to go out and do the higher end of the curve...
how do I put the filter in? where at?

[12secSS]

it's ok if it hits pe. i am confused as to why this was once considered a no-no . maybe old versions of hptuners did'nt have the ability to plot commanded data and then paste special, dunno. but if you have 12.5afr and that's what your commanding, you have zero error. if you take the pe or be factor out, you still have zero error.

That was because Fuel Trims were used to adjust the MAF/VE, hence no correction at WOT/PE ... or if the fuel trims were positive, it would add fuel. This was before wideband (or better yet Inputs) were developed.

[CalEditor@pcmcalibrators]

When we fixed your PCM we could have loaded a SD tune for you.

I will take a look at your logs

[robbyredneck]

That was because Fuel Trims were used to adjust the MAF/VE, hence no correction at WOT/PE ... or if the fuel trims were positive, it would add fuel. This was before wideband (or better yet Inputs) were developed.

thanks