Scanning for boost

[Harry Stone]

Hey guys;
Is there a PID for boost on the Wbody (Regal) list? I've checked and the 2 that I found don't seem to be quite right. Is there one I'm missing or do I need to make a custom? And if custom, how?
TIA for any help.

[JFDugal]

For custom boost & vacuum PID, try these:

Boost only
This PID reports ONLY boost values. Vacuum values are discarded. (units = psi)

([SENS.30.IMP]-14.7)*([SENS.30.IMP]>14.7)

Vacuum only
This PID reports ONLY vacuum values. Boost values are discarded. (units = inHg)

((29.92/101)*(101-[SENS.30.MET]))*([SENS.30.MET]<101)

As for creating custom PIDs, check out the help section of HPT entitled - Custom PIDs. It's under Working with VCM Scanner section. Much better explanation than I would give.

[Harry Stone]

Thanks, I'll give it a try.

[Harry Stone]

I tried that one, but it seemed to not report anything. I also tried the one in the help files. It is [PID11.IMP]-14.5
It does show info when I scan, but at idle it reads -8.x??? I'm not sure what's up here.

[Perforator]

That displays engine vacuum and boost. At idle and cruise it should be negative.

[Harry Stone]

So, how do I get it to ignore vacuum?

[Perforator]

For custom boost & vacuum PID, try these:

Boost only
This PID reports ONLY boost values. Vacuum values are discarded. (units = psi)

([SENS.30.IMP]-14.7)*([SENS.30.IMP]>14.7)

Edit: Just read you tried these and it didn't work, try ([PID11.IMP]-14.5)*([PID11.IMP>14.5)

[2therock]

Edit: Just read you tried these and it didn't work, try ([PID11.IMP]-14.5)*([PID11.IMP>14.5)

Hi, I need to be brought up to speed on how you typed the formulas in vs. what I put in.

Would I omit the parentheses and it look like the below? I wonder if the * is supposed to be there or have spaces on either side?
I also see a bracket missing behind the second set in some of the posts.

Thanks

[PID11.IMP]-14.5*[PID11.IMP]>14.5

[TXZ0603]

Tried your vacuum pid. It cant be right. Theres no way I have 26in at idle. can you explaine your equation better

[Perforator]

There should be a trailing bracket, typo on my part, sorry.

[2therock]

Tried your vacuum pid. It cant be right. Theres no way I have 26in at idle. can you explaine your equation better

I idle @ 19. More when real cold. Don't know about 26 though.

[2therock]

There should be a trailing bracket, typo on my part, sorry.

Hate to hammer you but I'm new. I can write GUI so I have to ask.

Is it exactly as below. Not enclosed by (parentheses)? No spaces around the * ?

[PID11.IMP]-14.5*[PID11.IMP]>14.5

Thanks

[Perforator]

I don't want to throw a monkey wrench in this but I just checked my dashboard since I have a boost gauge that displays positive and negative values and this is the custom pid I have defined for it.



((([PID.2332]*60)+10)-100)*0.14503773773

PID.2332 is Manifold Air Pressure so I'm pretty sure you need to be scanning Manifold Absolute Pressure for this custom PID to work.

[2therock]

I don't want to throw a monkey wrench in this but I just checked my dashboard since I have a boost gauge that displays positive and negative values and this is the custom pid I have defined for it.
((([PID.2332]*60)+10)-100)*0.14503773773

PID.2332 is Manifold Air Pressure so I'm pretty sure you need to be scanning Manifold Absolute Pressure for this custom PID to work.

Do you have a 2 bar MAP sensor?

[Perforator]

3 bar but I scaled the map values so the pcm reads correctly. It shouldn't matter.

[Eagle]

I'm trying to get this working under 2.23 and having no luck with the custom PID. Vehicle is a 2000 GTP.

PID.2332 doesnt return anything, leaving me with SENS.30 which seems to crash 2.23 and PID.11 which I can't get to return data that matches kPa measurements displayed by the MAP sensor in the scanner.

Any help would be greatly appreciated.

Thanks!

[Bill@HPTuners]

I'm trying to get this working under 2.23 and having no luck with the custom PID. Vehicle is a 2000 GTP.

PID.2332 doesnt return anything, leaving me with SENS.30 which seems to crash 2.23 and PID.11 which I can't get to return data that matches kPa measurements displayed by the MAP sensor in the scanner.

Any help would be greatly appreciated.

Thanks!

Yeah its an issue with 2.23

[Eagle]

Bummer. Any news on when the next release will be coming out?

[LosLS2]

I replaced the default Boost custom PID formula with the following ([PID.11]-105)/7 on v.2.23

This should work for a 2 bar OS. Atleast it works for mine (only in boost). Disregard negative values under vacuum.

[Eagle]

Excellent. I'll give that a try.