Since the tune for the supercharger was written for 9000 feet, I am sure part or all of the issue is because of the A/F ratio.
I have a few tricks up my sleeve before I freak out, but in case I run out of ideas does anyone know about, or know of people who are savvy with boosted engines?
The jeep is stuck at my house, so a buddy that can make a house call would be the best kind of resource, but I’m all ears if you know of local places that might be able to answer questions for me.
…fingers crossed it’s just a voltage issue due to ass-hat transporters leaving the lights on for 2000 miles.
I got a new tune and have been fighting an electrical issue in the meantime.
The jeep runs much nicer. I actually get 120 miles per tank now (up from 103)…
Anyone know why left directional would have my odometer blink? I’ve replaced the multi switch and flasher unit, but no good. One ground wire and repaired due to some chaffing, but that does not seem to be the whole fix. I am targeting G103 next to see if I can improve the ground there.
Anyway, it’s in fighting shape now. I hope to fix the electrical thing in time.
BTW, Buddy Souza in Briston/Warren is the guy for dyno and tune help. He’s not a jeep-only expert, but he’s the best I’ve met around here on tuning issues. He’s an expert on strokers for Jeeps if you are willing to pony up $500 for the serialized software from B+G.
Thanks for all the moral support. See you on the trails!
I’m back on the hunt for getting this LJR S/C back in action
9/21 - Transporter friend of mine made it to the tuner in Virginia. It will be assessed Wednesday 9/27
Planned scope of work is to
Measure the spray on the injectors to determine if they are the correct size and % of duty for optimal performance
Swap my SS e-fan controller to not melt when running at dual speed high during high temps and long duration
troubleshoot all sensors to ensure they act according to the ECM commands
write a brand new CAL, Dyno test and road test.
All work is being performed by A2Speed in Collinsville, VA. Dave Kasper is the tech and actually was a Chrysler employee who worked in the unit that developed the computer systems for the TJ and LJ (and Viper and Neon SRT).
These guys are also known as B and G performance. They have a website that shows they perform PCM mail-in service and are an excellent resource for MOPAR computer issues especially in the OBDII years prior to the JK. They also seem to be the HellCat tuner for the stars…
I’ll update this thread with progress to record how it goes.
When this is done, A2Speed/B and G will offer a CAL to be sold with the Magnum Powers supercharger. Anyone who was thinking about a S/C for a 4.0, may want to wait until it’s done because this tune will be virtually plug and play once written.
Dave says the old CAL was not very well written and the ECU shows signs of being “overflashed” which I guess means that there is residual code that has accumulated but maybe doesn’t play well with all the re-programming. He is working on wiping the PCM to begin a total tune from scratch. This sounds good, sounds like a fresh start, but also sounds expensive…
Did I mention I hate computers on mechanical things?
I have heard reference of “too many flashes” or " burned up the program slots" but noone seems to be able to tell me much about whether that is a real thing and what exactly it means.
I think I will be speaking to Dave directly about this concept and the state of my PCM, so I hope to have a more definitive answer to what that is all about.