MpvI3 and Jtec+

[LilSick]

yayyy

[ViPER1313]

Just so everyone is clear - you can data log with the Stable build on a V3 so long as you re-poll for parameters after connecting to the ECU and using the configs found on post #35. I have not tried adding my wideband into the mix yet but am hopeful it logs fine. I?m assuming I will have to bounce back and forth between the stable build to datalog the car and then tune/flash the car with the beta build.

[spoolboy]

Dude you are a legend. The stable version + whatever firmware is on my V3 right now does find and log the channels.

Not really. I just sent a request into support and after a few weeks they gave us a partial fix on accident.

Hardly anything legendary, maybe worthy of a participation trophy.

[ViPER1313]

Got a good data log. Just to confirm for everyone doing this, to do the flash, I need to use the beta builds correct? Stable still has flash issues with JTEC right ?

[Mully95]

Got a good data log. Just to confirm for everyone doing this, to do the flash, I need to use the beta builds correct? Stable still has flash issues with JTEC right ?

I have a 2020 Dodge Challenger and a 03 Dodge Ram with JTEC. My tuner said to always use beta on both vehicles.. stable isn't very much stable... LOL

[hyperbolecubed]

97 Jeep Grand Cherokee 4.0l JTEC. VCM Scanner works for me after using layout on post 35 and repolling with stable version.

How do you interpret the Spark Advance histogram? I understand the LTFT, mine is -15% so I would try to get that as close to 0 as possible by multiplying the tune fuel table by .90. But if you have a value of 17 in your spark advance, how do you interpret that to change your spark table?

[tbagg1ns]

00 Dakota R/T, 5.9L/46RE, JTEC+

MPVI3 and the latest BETA works for writing to my PCM. Used Stable for reading the tune and datalogging no problem. Read the stock tune and all 3 Superchips tunes successfully, then flashed the superchips tune back with the MPVI3.

[EvilR/T]

Does the Superchip tunes change any of the transmission programing?

[scottie1134]

I have the MPVI2 and I can't write my 2004 Jeep wrangler. It appears that the cherokee people are having a similar issue.

Well, after about a year of not really caring all that much, I finally flashed my jeep with the new MPVI3. It works. Turns out, for me, the MPVI2 was the problem the whole time. Fortunately it's only 1 credit to flash these older modules, so I just assumed I was out $50 or something. And a little bit of frustration. The jeep tuning is absolutely awful. I ended up picking up about 40 ft lbs down low and about 30 hp up top. It's whole different jeep now. Throttle response is actually a thing now. I wish I could do some trans tuning, but the scanner doesn't show output shaft speed. So I don't know if it's worth it to find another logging program to read trans output shaft speed in attempts to make changes there. But I'm pretty stoked about finally being able to enjoy my header and intaker. And no more CEL... so far

[beargibson3100]

Well, after about a year of not really caring all that much, I finally flashed my jeep with the new MPVI3. It works. Turns out, for me, the MPVI2 was the problem the whole time. Fortunately it's only 1 credit to flash these older modules, so I just assumed I was out $50 or something. And a little bit of frustration. The jeep tuning is absolutely awful. I ended up picking up about 40 ft lbs down low and about 30 hp up top. It's whole different jeep now. Throttle response is actually a thing now. I wish I could do some trans tuning, but the scanner doesn't show output shaft speed. So I don't know if it's worth it to find another logging program to read trans output shaft speed in attempts to make changes there. But I'm pretty stoked about finally being able to enjoy my header and intaker. And no more CEL... so far

This is kind of off topic, but what header are you using? Also have an 04'. Been looking at a long tube conversion.