Tunercat Tune Review?

[Aznpersuasion89]

Attached is a Stock 2002 Express Van 5.7 liter with 4L80E .cal file.
Also attached is the "Compare" summary .txt file.

The Express Van will have a different gear ratio and tire size, so the transmission shift parameters will be very different.

I wonder if the attached 5.7 flash, which has VATS Disabled, is worth trying? Sometimes, tuning requires starting from a different baseline flash. I've sometimes had to start all over, with a different flash and make "baby steps" to get a good tune. I often make only one change at a time, to verify if the "one" change is good or not.

dave w

I admittedly have no idea what im looking at when it comes to tuning. Jeff created this for me (and has been very helpful in trying to resolve this) and im just trying to get input on how a base tune should get built using EFIlive or HPtuners since tunercat doesnt exist around me.

[dave w]

The attached .ctz file was downloaded from the EFI Live Tune Depot website several years ago, which has a disappeared from the Internet or is no longer supported by EFI Live. I've used Tune Depot files without any issues or problems, except the VIN numbers are not complete.

The attached .bin file should work with either HP Tuners or EFI Live. The attached .bin file was a file I found in my "Unknown" file folder. Typically "Unknown" are files someone shared with me or I downloaded from the Internet that are not verified as stock.

dave w

[Aznpersuasion89]

Thanks! I'll see if my hptuner friend can see it

[Aznpersuasion89]

I'm getting the error message "http response failure" when trying to connect to the pcm to edit parameters, however we can read all the sensors in real time. Since the pcm is tuned with tunercat and we were trying to use hptuner, would this cause that type of error? Bricked/locked PCM?

[dave w]

I own TunerCats and EFI Live, so I'm unable to help with HP Tuners questions.

With TunerCats and EFI Live, I get a message that I'll need a code to read a flash or to write a flash to a password protected (locked) PCM. I'm going to guess, HP Tuners would have a similar message if the PCM was locked or password protected.

dave w

[Aznpersuasion89]

I own TunerCats and EFI Live, so I'm unable to help with HP Tuners questions.

With TunerCats and EFI Live, I get a message that I'll need a code to read a flash or to write a flash to a password protected (locked) PCM. I'm going to guess, HP Tuners would have a similar message if the PCM was locked or password protected.

dave w

From what I'm reading if the pcm were truly locked I wouldnt br able to live view sensor readings via hpt correct?

Were you able to look at that tunercat profile I posted and see anything that struck you as possibly causing hard starting? I open that comparison text but didnt really understand what I was looking at

[dave w]

I use EFI Live to view / record OBD2 sensor data. I can't remember using EFI Live to view / record sensor data with a locked computer.

It's very time consuming to review the changes of a flash file. The .txt file I posted is the best I can offer. Something else to consider, it's always best to compare the original file vs. the modified file.

dave w