2 bar SD map sensor reading incorrectly.

[killerjuice]

I have uploaded a copy of my Scanner Config file. My issue is that the map sensor reading isn't correct.

I have a 2 bar SD tune on the car, 2 bar 0-5v GM sensor 2000 camaro ss OS.


(91kap is correct for my altitude)

On manifold pressure SAE it reads 91kpa key on car off
on Manifold 2 bar KPA it reads 41kpa key on car off

If I leave both in the table display then my graph reads 61kpa.

I deleted the MAF and the Original Manifold pressure as per the instruction sheet, but I must be over looking something. I am dynoing tomorrow at noon- so I need the fixed ASAP. thanks for any help.

The voltage reading stays the same in both cases, I would like to leave it as the one that reads 91kpa, but it only goes till 105kpa.

[5_Liter_Eater]

post the tune and a log taken with that config.

[killerjuice]

I installed the beta version last night and now it reads nothing for the map sensor 2 bar. if I install the regular map it reads 91kpa key on not running, and 2.0 volts on map. That is the correct kpa and volts. dyno in 2 hours... ARG!



-Garrett

[5_Liter_Eater]

You still didnt post the tune but I'm assuming you've applied the 2 bar OS and did a write entire?

[killerjuice]

yes, I did that last summer, I'll do it in this post. sorry. I just installed beta 2.23 thinking it might help and the "map 2 bar" changed to 0, with 2.0volts still. I changed back to 2.22 and it still reads 0kpa and 2.0 volts

[5_Liter_Eater]

I'm not totally versed in 3rd gen 2 bar but I see in the tune you have the map linear and offset settings in engine diag/airflow. And since you have those configured for a 2 bar MAP I don't believe you need to use the 2 bar MAP PID. Just use the regular MAP PID. Am I correct in saying that the regular MAP PID is reading correctly with the 2 bar MAP installed?

[CancerJCC]

Do you have a custom boost PID created? Or MAF reading still in the scanner? If so delete those two as they will cause funky readings with your MAP.

In the end I played around a bunch before I got my 2 bar reading correctly. Good luck.

[killerjuice]

Bill - with the regular map SAE in the tuner it reads perfectly, but it only reads to 105kpa. Any thoughts to get that higher, right now I can't get it to read at all and I am 30 minutes from cancelling my 2 month wait for a dyno appt.

Cancer - I have the MAF removed and not sure how to make a custom pid.

I have team viewer if either of you want to log onto my computer and try and fix it while I am connected to my car

[killerjuice]

I did another "Write entire" anda now it is going betweem 78-82, That should be close enough to dyno, but the map SAE pid(1bar) still reads 91kpa, how can I write my own pid using sensor .30 or whatever?

-Garrett

[5_Liter_Eater]

So after the write entire the built-in MAP PID shows 78-82 with the 2 bar MAP installed and the engine off?

[killerjuice]

Thats correct.

[5_Liter_Eater]

Hmmm. You could add ~10 to the MAP offset. But Thats changing it by a lot.

[5_Liter_Eater]

What I dont get is why the 1 bar sensor is reading correctly even though the settings in your tune are for the 2 bar.

[5_Liter_Eater]

What MAP sensor is it?

[Russ K]

Had a 2000 F-Body with a 3 bar OS, the Map also read 0 KPA, key on, engine off, but was correct with the engine running. The 2 volts sounds right for your altitude. What does the 2 bar read at idle?

Russ Kemp

[killerjuice]

Now it's either reading 0 or -88 in the graph window, still 91kpa in the pid list.

[5_Liter_Eater]

Sounds like your graph is not looking at the right PID.

[robbyredneck]

what russ said 2v @ atmoshere should be the deal. there is a little goofiness at first. here's my cfg and i know it works

[killerjuice]

not sure why it is wrong, we just dynoed with map (volts) and used that for boost correction. What string would I need to write my own pid for my map using the voltage?

[robbyredneck]

do you have a log showing engine off, start and maybe a little free reving?