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Which tunes do I use?
The list of calibrations can be found by clicking on the [Change] button in each position. The calibrations are organized alphabetically by Hex code and you can use the tunes with the Hex code corresponding to the one you found using the "Box/Hex Conversion" tool. Calibrations are designated by power level (based on general HP gain) and basic functional features (towing, daily driving, racing, etc.).
Why do I only have a few tunes to choose from?
In some cases you will only have a few tunes to choose from. The main reason for this is that the calibration Hex you selected is one that has been superseded by another, more popular calibration. Please make sure you are using the calibration recommended by the “Box/Hex Conversion” tool. The other common reason is that the calibration is for a manual transmission (so there are no shifting considerations) or for an early build vehicle that does not support the higher power levels due to smaller injector displacements. It is also possible that the calibration in question is a less popular PCM that we have not written multiple calibrations for.
Can I use other companies’ tunes on my Hydra chip?
Absolutely!! There are numerous tuners that will be happy to write files for the Hydra chip. These files cannot be uploaded to our server, but they can be emailed to you and downloaded locally on your computer. Please consult the HydraHelp website for Tuners that offer calibrations for the Hydra chip.
Is the Hydra chip compatible with the PATS on my Excursion?
Yes. In the HydraFlash program, you are able to make the calibrations PATS compatible by clicking on the PATS wording at the bottom of the screen. If it is RED, then the Hydra chip will be programmed WITHOUT PATS supported. If it is GREEN, then the chip will be programmed WITH PATS support.
Why are there only 15 customizable spots on my 17 position Hydra chip?
The Hydra chip has 2 positions permanently programmed on it. One of the positions is “00”, which is a Stock/ Diagnostics/Chip Bypass position. The other position is “NS” which is a No Start position. The No Start position is an integrated security feature and allows for the PCM to be disabled in order to prevent vehicle theft. The other 15 positions are customizable with your choice of programming.
Do all 15 positions need to be programmed for the Hydra chip to function?
No. The Hydra chip can actually function without any positions programmed, using positions "00" (Bypass) and "NS" (No Start). You can also program any of the positions you choose, even leaving some blank in order to separate groups of tunes. The digital selector display will only show active, programmed positions, skipping any positions that are blank.
My truck won’t start… now what?
There are a number of reasons that a truck may not start following the installation of the Hydra chip. The most common problem is that the PCM was not thoroughly cleaned (sometimes not even cleaned at all) and the edge connector of the Hydra chip is not making adequate contact with the PCM connector. In these situations, we recommend removing the PCM and cleaning the connector again, making sure to clean thoroughly between each contact using a small, pointed object such as a toothpick or small screwdriver. Also, make sure to clean BOTH sides of the connector, separating the case (removing the 6 case screws) to properly access the backside of the connector.
My truck dies whenever I change levels – What’s going on?
The most common reason the vehicle will stall when switching positions is due to mismatched calibrations being programmed onto the chip. For example, if you program position 1 with a VRAA6S3-based calibration and program position 2 with a VRAA7S5-based strategy, the vehicle will stall when changing between the positions. ALWAYS make sure that all positions are using the same base calibration to avoid this issue.
I'm running a modified valve body in my transmission. What tunes do I need to run?
We provide modified valve body versions of many of the popular calibrations. Simply select the "Valve Body" version of the file you wish to run. These calibrations keep all the normal shift points and power output, but do not make any significant modifications to the shift pressure or timing.
My display works when the Hydra chip is connected to a USB cable, but not when it is installed in the PCM. What's wrong?
In most cases, this is an indication of a connection issue between the Hydra chip and the PCM. Please recheck/clean the PCM connector and retry.
My display is showing strange symbols when connected. What's wrong?
Often, if the display is not showing "PHP" during power-up or doesn't show a valid position, the cable may not be inserted fully or may be connected backwards. Make sure that the ribbon cable comes over the top of the chip and out the rear of the digital switch, and that both connections are fully seated. The connector for the switch may require a little extra pressure to ensure that it is fully seated.