[cjindna]

I would only suggest this if you are serious about going to LS but both HP Tuners and EFI Live would be valuable for monitoring everything currently as well as being able to support any tuning needs you’ll have with the swap.

Both are a little spendy and I would only purchase credits for Chevy. Even with Chevy credits either will allow you to monitor Chrysler side.

 

[cjindna]

Think of the vehicle’s OBD system as one large message bus with a message queue of sorts.

In order to subscribe to a particular message series on that bus you need to know the message’s identifier or PID. Once you know the PID for a particular message series you can then grab a snapshot or stream the real time messages in that series. Keep in mind some values are raw or real sensor data and some are calculated data.

There are minimum messages series that are required to be available on all OBD controlled vehicles, as mandated by fed reg, but there are essentially no limits on manufacturer specific message series and most all are extensive. This is why most basic scanners are limited in functionality and only capable of reading mandated message series. The scanner must have a catalog of manufacturer specific PIDs in order to read/display/log the extended message series or alternatively allow you to add PIDs on your own (good luck here).

I hope no OBD engineers read this rudimentary explanation and hunt me down for minimalizing their work.