Whats the correct PID for throttle position and whats the one to log boost

for boost i tried BARO sensor and Barometric Pressure SAE

I don't know the answer to your question, but I know Baro and Baro SAE are not correct. The Baro sensor is just that, an ambient atmosphere barometric sensor that makes corrections to AFR based on Baro SAE.

Look for something like MAP or BAR.

well i have map logging right now and tried setting up a user defined PID

That should be giving you your boost stuff. TPS is throttle position switch.

Throttle is ETC%

Boost you have to make a custom PID if you want it to read in lbs.

got it finally got it to work and it matches the map values wahoo! its quite a work of art

Desired ETC % is the new TPS PID basically for ETC vehicle.

As for reading boost yeah just log map then make a custom PID of map in psi-14.5=boost.

Thats not entirly accurate. Depending on alititude, the atmosphereic pressure may be more or less than 14.5. I'm at 1208 ft altitude and atmosphereic pressure is 13.96 psi.

I seem to have the Boost reading now by creating a custom PID with the map in PSI -14.7 and the psi matches is there some way I can get this more accurate?

I saw one of the PIDs was monitoring barometric pressure and it was like 14.18 or something so to get a more accurate reading i could do like say [PID.(map).IMP]-[whatever the right one for barometric pressure is] for a more correct reading

Make the PID, using the MAP sensor and subtract the baro reading.

which baro reading BARO sensor or Barometric Pressure SAE

Are the two sensors giving different readings?

boost is [SENS.30.IMP]-14.7

ETC is ETC POSITION

Right now im using [PID.11.IMP]-14.7 is there a difference?
Looks like I got the TPS right now, is it normal that it almost never says 0 and usually says like 11% at idle

yes, because you don't have an iac, the computer controls the throttle blade to maintain idle.

BTW those two calcs are basically the same, HPT usually recommends using the SEN though rather then the PID

I can forsee a lot of questions on my part when I finally get HPTuners.... I hope this stuff is easier than it appears when I finally get it. ;)

I can forsee a lot of questions on my part when I finally get HPTuners.... I hope this stuff is easier than it appears when I finally get it. ;)
Thats when the real questions start :lol:

Thats when the real questions start :lol:

SHIT! :lol:

i tried using the sensor reading first but it didnt seem to work

SHIT! :lol:
Na dude, once you get around the learning curve you start unlocking the power like crazy! Took me about a week to get it all figured out (hours of tuning a day) once I did my car was scary fast and getting scarier everytime I tuned it!!! :twothumbs

Na dude, once you get around the learning curve you start unlocking the power like crazy! Took me about a week to get it all figured out (hours of tuning a day) once I did my car was scary fast and getting scarier everytime I tuned it!!! :twothumbs

Cool. I'm sure I'll get the hang of it.

Sorry for interrupting the thread by the way. What is a PID? This stuff is starting to confuse me.

... you know now that I think of it, I don't know what PID stands for! Oh well :lol:

I honestly don't think there is a clear-cut answer to "what is a PID" where P, I, and D = something that makes sense. I just know it as a parameter to be listed in the table (a location for data to be seen).

proportional-integral-derivative=PID not many people know it but thats ok.

:wtf: I would have never guessed that in a million years!

proportional-integral-derivative=PID not many people know it but thats ok.

Good info! I always just figured it was the process id.

but thats what you get when an old unix guy hacks on his car...

OK so last night I took my first log of the cobalt seems I may have some issues the car is bone stock with no mods I have 1500 miles on the car, not sure if that has anything to do with the tune ive heard that it changes after 5000 miles. I dont have my wideband hooked up just yet. Good news is that I have no knock retard in spite of how poorly its tuned from the factory.

Some facts from the run
Max boost observed was 12.28 in 3rd gear at 6100
duty cycle is way beyond safe limits
commanded AFR is way off
Cat temp peaks at 1650
MAF peaks at 9300
at 6100 im getting 22.5 advance


Things that concern me is that my commanded AFR is 10.8 which seems way too rich and my injector duty cycle reaches 127%, why is Gm running the injectors this hard and incorrect on a brand new car?

Try this config file
http://www.hptuners.com/forum/showthread.php?p=64909#post64909

and get another log...

I am trying to remember the value for the duty cycle for stock injectors. I think the 60's use a value divided by 1200 but I don't have my laptop here to look at right now to compare them. Either way, try that config file and see what you get.

hp tuners has a built in calc for injector duty cycle and even if that was wrong my pulsewith 24.2ms at 6100 confirms it so theres nothing in the config file thats incorrect as far as logging I am indeed getting 127% duty cycle

whats the sweet spot AFR for this motor 11.7? I just need to know to set my tables up to shoot for it

I know I can but.....is it OK to use PID and SENS together in the same equasion? I'm going to use :

[SENS.30.IMP]-[PID.51.IMP]

Does this look OK? I have TONS of questions but I'll research for a couple of minutes...hours...days before I start a new thread ;)

I hate feeling like a nooooob.........but I am one....when it comes to tuning! I can't afford to blow another motor!!

yeah you can use several sensors/PID's in the equation.

Well looks like the MAF is pretty much dead on as far as calibrations go, I just want to confirm something here

say 2400 hz on my table says 4.96 grams per second
at that hz im reading an average of .66 lb per min converted to grams per second thats 5.00

Now if i go and put an intake on, what exactly happens and how is it recalibrated
im assuming ill read a different lb per min and have to enter a new value in my table