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yzriders182
April 27th, 2013, 12:28 PM
I went with a 2 bar map on a COS tune and I am having problems calibrating the map.

Since its a 2 bar map C6301 Map Sensor Scaler should be set to 190 right?

Then C6302 Map Sensor Offset should be set to a number that makes it read proper barometric pressure whit the key on engine off?

I set C6301 to 190 then played with the scaler to make it read proper barometric pressure for where I am. I then hooked up a vacuum pump and gauge to the MAP and pulled vacuum in steps to make sure the MAP would read right through its range and its way off...

Any suggestions?

joecar
April 29th, 2013, 04:54 AM
Can you post a set of your vacuum gauge readings and corresponding MAP pid values (i.e. in tabular form).

Which 2-bar MAP sensor do you have (are you sure it's not the 2.5-bar MAP sensor)...?

yzriders182
May 1st, 2013, 08:23 AM
I got the MAP for a 06 saturn redline...

After what you just said I did some digging and it seems I need the Baro sensor?

joecar
May 1st, 2013, 09:05 AM
PCM uses MAP at KOEO (key-on-engine-off) as BARO...

and during engine run it updates BARO if MAP ever exceeds it.

yzriders182
May 1st, 2013, 11:33 AM
So the saturn redline map sensor should work ok?

joecar
May 1st, 2013, 06:00 PM
Yes, I believe so.