There are several reasons to flash the PCM. The main reason is the SKIM or Security Key Interface Module. It is the factory anti-theft system built into the PCM. Flashing the PCM allows you to turn this function off, thus allowing you to use your oem ignition key and starting system. Without this function disabled, the vehicle will crank up and die within a few seconds. The SKIM looks for a specific ignition key with an RFID tag in it. If the module does not read this specific tag, the PCM goes into theft protection mode.
Secondly, the flash allows you to disable many emission and check engine light codes, so that you can install the new powertrain and actually have a functioning malfunction indicator lamp. Not one that just stays on all the time.
You can turn off rear oxygen sensors to run without catalytic converters, calibrate speedometers to a T, change shift points and line pressures in automatics, change all engine parameters from ignition timing, VE maps, fuel trims, idle speeds, knock sensor sensitivity etc.
It is especially necessary to calibrate the PCM to optimize your engine after a cam swap.
After much thought, I am starting a kickstarter project to raise funding for a Hemi Swap Database and file sharing system. The plan now is to post a collection of PCM calibrations and technical articles for all those interested in gen III hemi swaps. Punch lists on what you will need, where to get it and how to do it yourself.
Contributors to the project will receive benefits such as complete PCM calibrations by mail, access to all files and technical assistance when needed.
I need the funds to buy multiple OEM PCMs and tuning rights so that I can compile the tune repository.
For example: someone wants a 5.7 w a-833 tune on their PCM. Simply log on to the database and select the tune that best suits your build.
I do not want any money or profit off the database, I just want to create it for all Mopar brethren to enjoy. We are falling behind the LSX GM crowd and need to catch up!
Sent from my iPhone using Tapatalk
