MVP'S ZO6

Ok, car is a 02 ZO6 with a 2 bar OS via HP Tuners.

I want to accurately log vacuum/boost pressure.I tried using [PID.2333.PSI]-14.5 but it's not accurate when I change the last number to -14.44 it becomes reasonably accurate (to the limitations of the 2 bar sensor) in psig for the boosted regions of the table but not accurate under the vacuum regions of the table. if I manipulate the last number it becomes more accurate to psig in the non boost (vacuum) regions of the table but not perfect. Ive tried using the map sensor itself but everything I read suggest that I should be using the PID.2333 because I have a custom OS.

What am I doing wrong?

CamminC5

Try [PID.11.IMP]-14.5

Did you set your min and max in the chart configuration?

MVP'S ZO6

Pid 11 don't exist for me.

I don't even have it in the chart display yet as I'm just trying to get it to work right in the primary table display and then I'll put it in thE chart.

CamminC5

Pid11 is Map sensor in my scanner.

Try IMP instead of PSI. IMP is imperial.

jimbos'ss

Dsteck or 5le will likely know.

breecher_7

Shove the cable up your *** and start logging... Maybe that will do it.

robert miller

I feel the LOVE here guys...

MVP'S ZO6

Tony Likes Shoving stuff in his ***!! He says it solves all his problems.

Bump for a fix to my issue?

robert miller

Buddy that is even better than his remark on you.:hi de:

4DRUSH

Most likely, trying to fix something that isn't broke

robert miller

danieloneil01

How I did mine but not sure if this is what you're talking about since you may not have a boost gauge with a way to hook up to hptuners.

Histogram display -> Histogram Settings -> Pick one that's blank
PID -> General & Plot -> Click to the right of PID -> AUX input list -> User Defined -> Your boost gauge
Unit - whatever you want
Row & Col Axis -> Primary VE vs RPM vs MAP

5 Liter Eater

IIR the 3rd gen 2 bar custom OS requires the use of a custom PID for the MAP. Can't remember if it creates it for you or you need to create a user defined PID. But either way I "think" it defines it as a manifold pressure sensor. I use [PID.11.PSI]-14.7. You could also use [SENS.30.PSI]-14.7. On mine, both SENS.30 and PID.11 are MAP.

directnosfogger

I use [PID.2333.PSI]-14.7 fwiw. I'm not basing any tuning off of this, just a gauge on the histogram while I watch my logging. I don't think there is anything wrong with your equation.

directnosfogger

The problem with that is it uses MAP SAE I believe. This provides an inaccurate reading because it won't read into 2 or 3 bar. At least that's what I found in my testing.

5 Liter Eater

Well it sounds like the PID.2333 is the one that needs to be used in this case.

MVP'S ZO6

Edit:

I got the function string of [PID.2333.PSI]-14.5 to work correctly at idle. I'm assuming it's going to work in boost as well. It was an error on my part. thank you to everyone who helped.

MVP'S ZO6

its working right now. edited post above.

CamminC5

so what was the error?

MVP'S ZO6

Just a math error on my end. It don't really matter anyway since I only get about 15-16 psi out of my sensor anyway.