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Here is another log of the car at the track a couple weeks ago. It had a personal best 60 ft of 1.35 with minor tire spin.

If you look at this log, the shifts are also being commanded weird. ...

Thanks Joecar! This stuff is driving me nuts!

Attached is the log of the issue this morning. You can see in the screenshot the car shifted from 4th-3rd-2nd. Then held second until it bounced...

The shifting problem happened again this morning. Car downshifted from 3rd to 2nd like it was supposed to, but never commanded a shift out of second until I got out of the gas. I did not notice this...

Problem is when I spin the tires off the line and get out of the gas it shifts to 2nd, then when I get back into the gas it kicks down to 1st, but then the trans never gets a command to shift back to...

I am in the process of tuning my VE tables in Open loop and am seeing a problem with injector pulses. I just put in the 160 #injectors and it appears at slight throttle at cruise (70mph ish) the...

It would appear there is no table inside the 4l80E transmission tune to change the base transmission pressure (idle) via the PCS.

Why is this table not available? I would think there has to be a...

Thanks for the help! I'll make sure the bullets are in the gun this time=]

I will test it tonight to see if all is better. Any idea what causes the trans to shift at all when these tables are...

Thanks for the fast reply Joecar!

I am still a little confused though as the "stock" Silverado tune from Holden-Crazy I started with has the tables very similar to mine. (D0910 - D0925)

What...

I'm not sure if there is something wrong with the tune or my intermediate clutches are starting to fail... Problem is the 1st-2nd gear shift is not happening soon enough and engine is bouncing off...

I'm sure this has been beaten to death, but I am contemplating running the Bosch 160# injectors on my Turbo E85 car. Currently I have 120# injectors in and running decently.

The advertised min....

I see... Thank you very much I forgot about that table!

For some reason my SAE.MAP pid only logs up to 105 kPa, so I had to write a custom pid to calculate the the MAP pressure from GM.MAP...

Does anyone know a good way to make timing consistent for WOT runs. I attached a log and current tune file...

My biggest issue currently is the timing drops 3 degrees in 3rd gear vs. 2nd gear at...

I thought maybe I should upgrade my firmware, but I am having an awful time finding "F6: Device Settings" as the instructions say. I have a flashscan V1.2 and currently it is loaded with Interface...

PIDS EXT.AD1 and EXT.AD2 are not reporting correct voltage back to the scan tool.

I was attempting to log my wideband when I found the issue. Basically with the inputs unplugged from the...

Thanks for all your help joecar! I had to add a star in front of *CLC-00-042 to get it to work, but it works great, and I was able to add my own pid by using your format.

The equation ended up...

That's great! Thanks a lot.

I believe the equations should be: CALC PID = GM.MAP (volts) * (Map Scaler - Map offset)/5 volts + (Map Offset) ==> For my 3-bar sensor -- GM.MAP * (288 -10)/5 + 10

Does this look right?
...

Just tried logging this PID "GM.MAPBOOST_DMA" and I can't get any response from it. (All zeros!) Is there something I need to do to make it link up? Could not find anything in the sae_generic.txt...

Car is a 2000 Pontiac TransAm and when it was originally converted COS05 I believe it was calibrated with a 2002 TransAm OS#12212156.



I will try this...
When you say the PCM is doing this... ...

Tried to load the original COS05 file that was pulled out of the car and it doesn't work (SAE.MAP pegs at 105kpa) Also tried a fresh COS03 tune and a different laptop.

Do I need to create a...

I re-flashed my original COS05 file and still SAE.MAP pegs at 105kpa. Also tried a fresh COS03 install and have the same issue. I also tried a different laptop and have the same issue.

Is...

I will try that! If that doesn't work I will Flash COS03 (02020003) then calibrate it with the stock tune for that car.

Originally the car had OS05. We did a full reflash with OS03 the used the OS05 that we downloaded from the car to do the calibration.

Maybe using the OS05 as the calibration caused a problem?

We did set the scaler in C6301 to 288 yesterday, which seems to be very close, but still needs slight tweaking. I am new to all this stuff, but it seems like the issue is with the logging software...

Thanks! Here is a screenshot showing the data tab for the test.

I hooked up a vacuum pump to the MAP sensor and pulled the vacuum down to 16kpa and both GM.MAP & SAE.MAP PIDs seem to function...