adding fuel pressure and WB02 into ecu.

[RADustin]

Hi all,

I'm looking to add fuel pressure and WBO2 into my ecu so that I can easily log with efilive. Later I plan to monitor both with an OBD2 style gauge that polls off the data lines, which is why I'd rather not run either signal analog into the V2.

I have found the tutorial for adding fuel pressure to the ecu using the egr circuit. If this is done, can I add WB02 in through the a/c pressure circuit? Looking at the LC2 from innovate so I can program it to be linear 0-5v no problem.


Do you guys think this would work?

[picnic_george]

As long as your pcm has both you can use both.

[RADustin]

Currently I am OS12593359. My end goal is COS5 based on OS12212156.

Engine is a 99' vette LS1 in a street rod project, all emissions are removed. I don't think it had EGR stock- but could I enable it so that it reports?

I imagine all ECUs have a/c inputs?

[joecar]

If you need a third input:

if PCM is not using EOP (engine oil pressure) input, you may be able to use that (must enable it in table G1207).

[RADustin]

can I tie any needed 5v references and grounds to the EGR ones?

[RADustin]

questions- got everything wired( I think). The autometer fuel pressure sensor in the EGR ports and LC2 WB02 in the a/c.

I made the following calc_pid file. Can someone give it a once over?

I think my WB02 forumla is "({GM.ACP}*2.608)+7.35" because the LC2 is setup to be 0V=7.35AFR and 5V=22.39AFR.

Not sure what PRN is??? I just indexed it 1 to not interfere with the fuel pressure sensor.

Anyways, my calc_pid file should be attached.

Thanks!
18079

[joecar]

I think my WB02 forumla is "({GM.ACP}*2.608)+7.35" because the LC2 is setup to be 0V=7.35AFR and 5V=22.39AFR.

For 0V=7.35AFR and 5V=22.39AFR, the equation would be V*3+7.35...

[joecar]

I fixed your calc_pids.txt file, see attached...

[joecar]

You would use the pids CALC.FP.psi or CALC.FP.kPa, and CALC.WBO2.AFR and CALC.WBO2.LAM (use lambda for tuning).

[RADustin]

Thanks sir. Long day yesterday- I even laid everything out in excel to make sure the slop of my line was correct. Apparently I still failed lol.

Is there a document that lays out the formatting of these text files? I see you combined the fuel pressure and WBO2...

I would like to make another calculated PID- for boost pressure. Is it possible to to take baro pressure and subtract it out of MAP real time? Or do you assume baro to be constant? Not looking to tune with this variable- just a quick reference while driving and reading logs.

[joecar]

lol, we all have our moments :)

There isn't any doc regarding file format, you have to use an example file.

The CLC's group together, and the PRN's group together (so the FP and WBO2 appear to be combined, but they're not).

See attached for boost pressure pid...

[RADustin]

I guess I should have mentioned I am going 2bar, but what you've done looks perfect.

Thankyou! More questions to come once I get driving and hopefully autove'ing.

[RADustin]

Hi Joe,

Another question- how do I resetup Base Efficiency Numerator PID to work with the way I have the WB02.

I am setting up my PIDs to do an autoVE as my end goal is CL SD, mafless.

[RADustin]

maybe I got it to work?

18084

[joecar]

Try this (attached)...


( avoid using AFR for tuning )

(that's why we unfactor out the LC-2's stoich 14.7, and why we use EQIVRATIO)

[joecar]

Also, try this, I simplified and condensed it further (I like this one better)...


in this case, the BEN pid is CALC.WBO2.BEN

[RADustin]

Thanks Joe.

[RADustin]

so basically I select CALC.WBO2 - and then in my table I tell I want to use BEN as the units...correct?

[joecar]

so basically I select CALC.WBO2 - and then in my table I tell I want to use BEN as the units...correct?Yes, correct.

[RADustin]

Hi Joe,

The baro PID is coming up invalid. Any ideas for this?

[joecar]

Try GM.BARO and GM.BARO2.