got a powrtuner!

[ericjon262]

got the injectors figured out,

http://www.syner-g.org/JerrysTuningNotebook/

bin prep stage one, about halfway down.

I'm working on tuning out the post cat o2, the EGR, and the Evap purge, I also need to update the bin for the ZR1 map sensor I am using too.

can anyone give me a little direction?

Thanks-

Eric.

[unchained01]

If i am not mistaken they need set to "3" So they dont report I am as new to it as you and will be doing the same thing soon

[3400-95-Modified]

Just change associated codes for those items to 3 as noted, for no reporting... And then for EGR you can change the EGR air temp disable to something obnoxiously high like 200 so it's always "off."

I have the steps necessary to remove the second O2 and not fail OBDII emissions check.. Give me a min on finding those codes.

From Beretta.net
OBDII Code Removal

I shut off 9 codes in my system so I could get the Catalyst ready, O2 heater ready, EGR Ready and then actually the last one will go ready normally as you drive the car, so that one is not tricked.

These are the codes I changed to make the Catalyst Ready

* P0137 - Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 1 Sensor 2
* P0138 - Heated Oxygen Sensor (HO2S) Circuit High Voltage Bank 1 Sensor 2
* P0140 - Heated Oxygen Sensor (HO2S) Circuit Insufficient Activity Bank 1 Sensor 2
* P0420 - Catalyst System Low Efficiency

These are the codes I changed to pass the O2 Heaters

* P0135 - Heated Oxygen Sensor (HO2S) Heater Performance Bank 1 Sensor 1
* P0141 - Heated Oxygen Sensor (HO2S) Heater Performance Bank 1 Sensor 2

And these are the codes I changed to pass the EGR system

* P0401 - Exhaust Gas Recirculation (EGR) Flow Insufficient
* P1406 - EGR Valve Pintle Position Circuit

Now this was all done to a 1997 Venture Bin file VIA DHP, All these same codes exist in a 1996 Beretta file as well and will perform the same function. If you wish to have ALL systems pass as soon as you turn the key on, then you would remove the same set of codes in my first section, but you would do that for Bank 1 Sensor 1 as well as Bank 1 Sensor 2. This works because you are changing all the associated codes for each system to never report a failure, so since they can't report that then the systems are automatically set for ready.

This doesn't include Evap since mine is still in operation.

[TGP37]

Edit again: Found an answer for you

link

Change tables......

Stock Values
map sensor linear 128.13 kpa
map sensor offset -0.31 kpa

ZR1 Values
map sensor linear 312.50 kpa
map sensor offset -11.25 kpa


careful, your PCM may be limited t0 200kPa max (2bar)

[ericjon262]

I don't see a "map sensor linear" under Map in DHP or tiny tuner, I'm looking under fuel>Map (tiny tuner) and Calibration data>fuel>map in DHP. should I be looking for something else?

[TGP37]

Changing MAP sensor table data. Sorry, those tables were what I was told to check a while back...I found the tables in my files...here they are.

1 bar map
MAP Scaling Factor: 94.39453
MAP Sensor Offset: 10.33203

2 bar map
MAP Scaling Factor: 200
MAP Sensor Offset: 7.988281

ZR1 3 bar map (assumed!!!)
MAP Scaling Factor: 312.50
MAP Sensor Offset: 11.25 (or -11.25)

I seriously insist on caution and test test test first because of the unknowns. You might be stuck at 200kPa. If you have a compressor you can check by logging MAP data from the PCM (key on) and apply pressure from a compressor. See if the PCM recognizes anything past 200 kPa or if it stops there. Definitely don't want to hit that kind of fueling wall. Surging past 14.7 psi boost but fueling remains steady.....would go hellish lean and probably melt a piston or two.

You also might have to change tables
Always Use Default Baro: 1
Default Baro: 98.00781 (you could use your local barometric pressure kPa for greater tuning accuracy)

Also, use default baro is important so your PCM doesn't change the stored barometric pressure from boost and screw the fueling up. The PCM will automatically assign the highest read kPa as barometric pressure. For NA cars this is fine, but for boosted it really messes things up. And you can't tune around it because it resets every time the car is started then changes after 1st boost run. It is a real PITA if you didn't know what was going on. Took me a while to track down that bug in my tune.



Another test you can do: With key on see if the ZR1 MAP sensor reads the proper atmospheric pressure. And then if you have the engine idling, check the MAP reading again. Switch to the 1 bar map and tune, see if the idle MAP values agree w/ each other. If they do, then I would feel good about the tune and say the ZR1 map is calibrated.

If you find the MAP sensor is off by 22.5 kPa, then switch the MAP Sensor Offset from 11.25 to -11.25

[3400-95-Modified]

Also, use default baro is important so your PCM doesn't change the stored barometric pressure from boost and screw the fueling up. The PCM will automatically assign the highest read kPa as barometric pressure. For NA cars this is fine, but for boosted it really messes things up. And you can't tune around it because it resets every time the car is started then changes after 1st boost run. It is a real PITA if you didn't know what was going on. Took me a while to track down that bug in my tune.

I remember you saying to do this but I don't think I did it on someones tune I was doing and it hasn't produced any odities... Also I copied a lot of tables from a boosted car's map and the "use default" was not set to 1...

[ericjon262]

I think I might sell the ZR1 map sensor, and nab a L67 map and use the tables from an L67. I don't think I will need more than 15 psi on this build anyways.

[3400-95-Modified]

I'm tuning Tylers SC'd 3400hybrid he built and he is currently only using a 2 bar but his SC also only goes up to 8PSI with his current pulley. I'll have to find those other tables but I used L67 info to setup the map sensor values and I did find another table that I think counteracts this use default MAP setting.

[TGP37]

I remember you saying to do this but I don't think I did it on someones tune I was doing and it hasn't produced any odities... Also I copied a lot of tables from a boosted car's map and the "use default" was not set to 1...

It is a real issue for my PCM, but I also use 97, one of those odd years.

I logged both Barometric pressure from the PCM and MAP sensor. Sure enough, the Baro rose with the MAP as it passed the real baro reading at start up. And it would stay 105 kPa after 1st boost.....I'm as sure about it as I am sure rain is wet. So there must be something we're not understanding as of yet..

I even tried nipping boost and If the MAP read 102 kPa max boost (very mild) the baro pressure would be set at 102 kPa.

If there is another set of tables controlling barometric relearn I suppose that could cause the issue you speak of. On a 98 3800 file I did notice a throttle versus baro relearn table and it was set at 100%.

[3400-95-Modified]

Tyler is also using a 97 Venture ECU/file. I'll post up the table that I think is counter acting it, and I'll try to get him to log a Baro and MAP reading the next log to see what it's actually doing.

Edit-
Under the SC section I did enable the SC present switch, and I also copied over the SC Baro Lookup table. There is no definition on what it does but the 97 L67 file had values in it where the NA versions are just all Zero's...

But like I said I'll have him log both and see what it says because in the 97 L67 file the use default switch was not enabled so I opted to not do that on his file.

[TGP37]

I'm tuning Tylers SC'd 3400hybrid he built and he is currently only using a 2 bar but his SC also only goes up to 8PSI with his current pulley. I'll have to find those other tables but I used L67 info to setup the map sensor values and I did find another table that I think counteracts this use default MAP setting.

I know the PCM I have has a supercharger option but I didn't activate it. Possibly that is the defining difference? Kind of like NA mode vs Boosted mode, I would hope GM doesn't get baro from max map reading on a SC file, lol.

[ericjon262]

I know the PCM I have has a supercharger option but I didn't activate it. Possibly that is the defining difference? Kind of like NA mode vs Boosted mode, I would hope GM doesn't get baro from max map reading on a SC file, lol.

I've been eyeing that section of TT up for a while, I've been thinking about trying to make a built in boost controller.

[TGP37]

I've been eyeing that section of TT up for a while, I've been thinking about trying to make a built in boost controller.

That would be awesome. I also want to find the pin out on the pcm for the secondary o2 sensors. 2x o2 primaries so the fueling control is split by bank. I can activate the secondaries, just don'y know how to wire it.




3400-95-modified, here is a pic of a log where I can show the effect occurring.

[unchained01]

These are the steps i was told to use when using a LS1 Map on my car :
These have to done in tiny tuner


First open "configuration-->Baro-->always use default baro" and set it to 1 for yes.
Then go down to "Default Baro" and enter a number. Might want to check the baro for where you are with your scanner and current MAP. It should be close to 100Kpa though.
Next go to "fuel-->map-->default max map" and set it to 200Kpa (this is 2bar or 14.7 psi above normal atmospheric pressure).
Then go down to "map scaling factor" and set that to 200.
Then go down to "map sensor offset" and set that to 7.99 (it will actually save as 7.988281)

That should be it. Five changes. Save it as a new file name in whatever folder you access to write with DHP, then open your DHP tuner and flash it to your PCM

Also the wiring connector need to be slotted to because it is reversed