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Thank you so much for the explanation on the warm spark table. I couldn't figure out what it was used for. HPTuners explanation is very vague.

heres the tune
135632

I've been messing with this for a while. It was dyno tuned by a shop in Kennesaw Ga. The tune wasn't quite correct, so instead of keep paying them hourly to keep messing with it, I bought a MPVI2 to...

There are 3 big spark tables on the JTEC editor screen. EGR off, EGR on, and warm spark. My engine doesn't have an EGR valve. The main table for writing spark advance is EGR off table. Does anyone...

Try re-syncing the MPVI. I do believe it's the blue icon on top of the vcm editor screen.

It's about time! I'm all for capitalism but when someone tries to charge $650 for a MPVI2...I hope they get stuck with them.

Anyone familiar with the JTEC platform know how to increase engine speed when a/c selected, or if it can even be done. I don't see any parameters in the HP file to do this. (although I am fairly new...

Here's a stock 5.9 auto tune. It is a little different from the 1999 manual tune. The 5.9 manual tune has more timing in the EGR graph, but it also pulls more timing out in "critical spark" timing...

Here's a manual trans tune I downloaded before I modified the tune.

Manual or auto Trans?

I've had no problem writing a 1999 JTEC. I hope you get it figured out.

I'm new to tuning...what is a good setting for cell hits in scanner when data logging. I currently have mine seat a 5. Is that too high?

I don't mind paying a man for his time. especially if its his business, but I want to be sure I know what I'm purchasing (I feel I've been burned once). Thanks for checking with your friend on info....

There's another tuner that's supposed to be good with JTEC, but when I asked him a few questions to see if he thought my computer was bad or if this is something he has seen before and if adjusting...

The only way I see to disable closed loop would be to set the ECT so high that it never goes into closed loop. If you look at the HP editor for the JTEC, its very basic. It doesn't have a lot of...

There's a TSB I found that the computer I'm using is affected by. It has something to do with lost idle steps and stalling. The TSB gives a software update it needs to have. I don't believe my...

They used a tailpipe o2 sensor to set fuel trims and I'm running cats (i have to be emission legal). I don't know if cats will mess up the A/F reading at the end of the tailpipe or not. So I...

I haven't. This was dyno tuned by a shop. It's a brand new engine. It was running really bad so I took it to have it dyno tuned. When I got it back it was running good enough to drive. Thats when I...

here's my latest tune file and run file

The only way I can get it to stop stalling is to set my idle spark thresholds like the Mopar Performance 98 Grand Cherokee

I set all reverse correction drive to zero, no help. I set all my idle timing tables the same and all main timing tables the same, no help. turned off DFCO, no help. I've tried 2 different IAC, TPS,...

I'm learning and trying to fix an idle issue...can you elaborate more? this is a dodge jtec computer.

I know this is an old thread, but im looking for a 5.9 manual trans tune. did your truck have a manual transmission?

Does anyone know what the reverse idle steps are used for?121088

I've installed a new Mopar IAC valve, I've tried 2 different vehicle speed sensors, 2 different Mopar throttle position sensors.
Trying to find information on the JTEC platform is next to...