AutoVE tuning with turbo

[MN C5]

ive searched and i havent been able to find any help with making a 2bar map work. everybody says to talk to Rick at Synergy and i did, but he sounded like he wants me to drive up there, its a 7hour drive :-(

O.K.
Not sure what 2bar sensor you have but basically what we are doing is halving the values from the MAP sensor so 100kPa becomes 50kPa as far as the PCM is concerned.
Another example, 150kPa at the engine, the PCM thinks is 75kPa, the reason being is the PCM will limit any kPa reading to 105kPa even if it is higher.
This is achieved by rescaling the MAP sensor, see parameter - C6301.
What we want to do is to be able to turn the key on (engine not running) and see the MAP sensor reading 50kPa.
This is done by changing that value above, the 2bar GM sensor I have (PN 16040749) needs a value of 127 in that field, you might need to play around with that a bit to get it spot on.
Then we also need to disable the running barometric pressure learning, this causes all sorts of issues.
Do this by going to parameters B0301 and B0302 and set them very high, like 7300 and 7500 RPM.
Also, set table B0304 to 1.0 everywhere.
Next we need to turn off the MAP sensor codes, do that by going to the Engine diagnostics section and change P0106, P0107 & P0108 to 'X'.
Also once the MAF is unplugged you will need to change just 'P0102' in the MIL light reporting to "No MIL".
If you have an ETC you will probably also need to change the table C6101 to the maximum allowed value.
If your MAP is scaled correctly then you need to think "Double Everything I see in kPa" for the real world value.

This should be enough to get you headed in the right direction. Does the 98 pcm have 2 VE tables? if so you'll have to do both tables I'd think..

[WicketMike]

O.K.
Not sure what 2bar sensor you have but basically what we are doing is halving the values from the MAP sensor so 100kPa becomes 50kPa as far as the PCM is concerned.
Another example, 150kPa at the engine, the PCM thinks is 75kPa, the reason being is the PCM will limit any kPa reading to 105kPa even if it is higher.
This is achieved by rescaling the MAP sensor, see parameter - C6301.
What we want to do is to be able to turn the key on (engine not running) and see the MAP sensor reading 50kPa.
This is done by changing that value above, the 2bar GM sensor I have (PN 16040749) needs a value of 127 in that field, you might need to play around with that a bit to get it spot on.
Then we also need to disable the running barometric pressure learning, this causes all sorts of issues.
Do this by going to parameters B0301 and B0302 and set them very high, like 7300 and 7500 RPM.
Also, set table B0304 to 1.0 everywhere.
Next we need to turn off the MAP sensor codes, do that by going to the Engine diagnostics section and change P0106, P0107 & P0108 to 'X'.
Also once the MAF is unplugged you will need to change just 'P0102' in the MIL light reporting to "No MIL".
If you have an ETC you will probably also need to change the table C6101 to the maximum allowed value.
If your MAP is scaled correctly then you need to think "Double Everything I see in kPa" for the real world value.

This should be enough to get you headed in the right direction. Does the 98 pcm have 2 VE tables? if so you'll have to do both tables I'd think..

wow! thanks.

ok, so i first set C6301 to a number (127example) that will get me to 50kpa map with the ignition on.
Then setup the other parameters.
When you say if my MAP is scaled correctly then i need to double it. your talking about the Main VE table correct and backupVE table cuz of 1998. My tables are stock right now, only mod is the turbo. So should i double all the numbers and then do AutoVE?

thank you very much for your help

[MN C5]

Sorry I didn't see this till today.

Save your current tune under a new name like BoostedVE or what ever you want.

Then open a second running program of Flashscan with your current tune.

From your original tune copy and paste the VE table values into the other running program with the open file Boosted VE. Start with the 100kpa and paste it into the 50kpa slot.. 80kpa to 40kpa and so one... then smooth the table from 50kpa down. Then follow the instructions in the Custom OS for filling in a boosted VE table. You will need to convert your EFI Live readings depending on how you set it up. I wanted to see real KPA #'s so I was able to use auto tune by copy and pasting one KPA column at a time.

Let us know how your doing.

Dennis

[WicketMike]

I turned on the ignition with the orginal map to see what the map kpa was at and it is at 96, does this mean i should aim for 48 when i put the 2 bar map sensor in? also, could cold weather cause the map kpa to be lower?

thanks for your help!

Mike

[MN C5]

That will work so will 50kpa. Auto tune will compensate for the difference.

[WicketMike]

Picked up the car today,

I had to take C6301 down to 90 to get it to read 50kpa with just the ignition turned on, stock is 94.

that sensor you said you used (16040749) is a 3bar sensor, did you type 2bar by mistake?
The sensor i went with was 12580698

I should be able to start AutoVE tommorow.

thanks for your help

Mike

[MN C5]

Could be, I'm using a two bar. I might have posted the wrong part # I'll have to check.

[WicketMike]

well i started to tune today after it stopped raining :-( and i cant get the idle AFR to lean out at all, its at 10.8 and wont change. i leaned it out by 25% and still reads 10.8. I tried going into the bidirectional and command it and it still wouldnt change

[MN C5]

how are you leaning it out? Are you tweaking the VE table or the injector flow rate? Take a bigger wack at it. And what KPA is showing up at idle?

[WicketMike]

how are you leaning it out? Are you tweaking the VE table or the injector flow rate? Take a bigger wack at it. And what KPA is showing up at idle?

The IFR table i setup using the spreadsheet and left it alone, now im doing the AutoVE and tweaking the VE tables. KPA at idle is 20.

I keeps saying to lean out 20KPA at 800 rpm by 25% everytime, ive done it twice and no changes.

thanks

Mike