What does the MAP pid show with engine not running...?
What does the MAP pid show with engine not running...?
map pid engine off
It says its at 14.1 psi, which must be atmospheric (even though its off .6 psi?). I added the gear pid to see shifts during logs, but It says it was in second while the ignition was off(in park) and then after startup it went to first (still in park). Is that odd? I had a 4l60 harness and am running a 4l80e, i swapped pins around according to lt1swaps site.
Last edited by Prormk163; April 24th, 2016 at 08:44 AM.
One way to check accuracy is to drive steady around 2000rpm. Your 02s will cycle steadily around stoich. You should
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Are you speaking of my stock O2's? I am using just 1 Wideband on the drivers bank. How can I tell if my stock O2s are at stoich? A certain mv. Level? I apologize if it's an ignorant question.
Not ignorant at all.
Yes NB02 refers to the stock Narrow Band 02s. You should have already changed the switch point by now to 450mv(per calcvet ). 450mv equates to stoich. At a steady rpm, the nb02s will cycle from around 0 to 850 mv. They cycle around 3 times per second.
850mv related to something like 15.2 AFR, and 0 ish is like 14.2.
If you plot WB02 lambda during a steady cruise, change the graph range from. 95 to 1.05 by right clicking the axis, selecting series, and then selecting the wb02(you should now be able to change that channels min /max.
Plot the nb02s below it and you should see the WB02 cycling exactly like the nb02s. I'll try to find a pic of this later on to better explain.
If this doesn't make sense, just let me know, I'm in a dept meeting right now so I'm doing my best. :🍻
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Last edited by Jetmech442; April 25th, 2016 at 03:50 AM. Reason: Spelling error correction
Awesome! That makes perfect sense. So essentially just comparing the narrowband to the wideband at a relatively constant level will prove the accuracy of my wideband at a known stoich region! Thanks!
thanks a lot! I'm new to this but I'm trying to take it all in. I'm controls tech for HVAC so a lot of the theory i understand, just applying it to a different application is challenging. But I enjoy it and I am learning a lot. Thanks for your help!
OK, thanks.Originally Posted by Prormk163
What elevation is your location...?
BTW: kPa is much easier to use for MAP than psi... in scantool, on PIDs tab, place cursor on MAP pid and go rightclick->Metric; then on Dasboard B, change the MAP pid to show kPa.
+1 what JetMech said...
( not ignorant at all, this is learning curve )
log HO2S11, HO2S21, EQIVRATIO, WO2EQR1 (and make sure the pid channel count is less than 25, see bottom of PIDs tab in scantool)...
and observe how HO2S11 and HO2S21 cycle in relation to the level of EQIVRATIO and WO2EQR1.
Post logs and screenshots.
Sounds good! I probably won't get a log in until Thursday, it's supposed to be cool here in northern Mn again and rain.
Should I have done calc.Vet prior to AutoVe? If so I have not done so.
I will change the map PID back to metric. I think when I was messing with my speedo I may have clicked all instead of speedo to imperial. . My elevation is at about 1500'.
Last edited by Prormk163; April 25th, 2016 at 10:51 AM.
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