New to forum, 2015 JKU with 3.5 AEV, Prodigy Stage 2

Some clarification on the starting issue...

It only happened for me with one of the more recent tunes, and only when the engine have been fully warmed up by driving, then partially cooled down for about 1-2 hours. It would sometimes start then immediately stall. Then it would require a solid 3-5 seconds of cranking before it would hesitantly start again. It would start fine if the engine was cold, or if the engine was hot. Prodigy said there was just too much fuel being added during cranking. An updated tune solved this issue for me.

This discussion of running too rich has reminded me that I often smell that "unburnt fuel in the exhaust" smell right after parking and getting out of the Jeep, where I had just been driving "normally" (no hard acceleration) for quite a while before parking.

Then there's also the loud popping in the muffler when lifting off the throttle right after hard acceleration in 2nd gear (probably excess fuel igniting in the exhaust). Multiple people have confirmed this is happening for them.

I've observed in data logs that part-throttle acceleration in the 1500-2700 rpm range shows a lot of negative long term fuel trim (down to -22%). I've seen this in everyone's data logs that I've seen so far.

It seems to me that the tune is generally running on the rich side.

Thanks for the insight pickles. I was told this tune is running in over 100 Jeeps. I have a question.

Seems we are all getting minor tweaks of this tune. Minor tweaks seem to make a HUGE difference. I'm curious how his can be considered same unless I'm missing something. Seems like collectively they would collaborate some how.

Looking forward to mine.

Ok so looks like my guys are lost. Prodigy to the rescue. They are driving up to lay some healing hands on the situation.

More to follow
BK

Quote:

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Originally Posted by Bkeef

Ok so looks like my guys are lost. Prodigy to the rescue. They are driving up to lay some healing hands on the situation.

More to follow
BK

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WHOA. thats cool. You know it will get sorted out right the first time once wes is on the case.

When is the visit from Prodigy happening? I can't wait to hear what they find. I'm hoping for another breakthrough in the tuning like the one that led to the most recent tune that is a huge improvement over prior tunes.

Quote:

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Originally Posted by Bkeef

I was told this tune is running in over 100 Jeeps. I have a question.

Seems we are all getting minor tweaks of this tune. Minor tweaks seem to make a HUGE difference. I'm curious how his can be considered same unless I'm missing something. Seems like collectively they would collaborate some how.

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From what I understand, the end goal is to have a single tune, served by Diablosport's servers for an automatic download to the InTune, built up from feedback and data logging from many vehicles. The whole system of automatic updates from Diablosport's servers is already setup (from the beginning). I think they just haven't updated the tune on the server in quite a while. So even though many of us have gotten custom tunes from Prodigy, they are probably all built from the same most recent version of a "template" that Prodigy is maintaining and will eventually put on Diablosport's server's as an update.

We have no way of knowing how major or minor the tweaks are to each version of the tune. All I know is that the biggest improvement to the tune was the result of a discovery that some engine load calculations were incorrect. Fixing that may very well have been technically a "minor tweak" to some numbers in the calibration, but can have major effects on driveability because engine load is a core parameter used to determine ignition timing and fuel injection. A small error in engine load could be compounded through the various calculations, in complicated ways, resulting in a complicated pattern of varying amounts of error in ignition timing and fuel injection.



As for "this tune is running in over 100 Jeeps", I do not see that as valid evidence that any issue you are experiencing is not related to the tune.

1) Different people drive differently, in different conditions (elevation, temperature, humidity, etc), and have different combinations of tires, axle ratios, and vehicle weight. Therefore different people are very likely to encounter different patterns of engine load/speed, etc when driving, and exercise different "areas" of the tune than each other. If only a small percentage of people experience some issue, it may be because only that small percentage of users encounters the specific conditions that expose a flaw with the tune.

2) Different people have different expectations and thresholds for perceiving something as a problem. What I notice as a jerk, hesitation, or surge in acceleration might go completely unnoticed by another person. Even if another person notices the same thing I do, they may either consciously or subconsciously ignore it or rationalize it away as "just the way it is". Especially early on when they are still in the "honeymoon" phase, amazed by the power.

3) Different people have different thresholds of annoyance before deciding it's worth the effort of complaining about an issue and seeking a solution. Some people who encounter an annoyance just assume that it's "just the way it is" and can't be fixed, and only complain to their friends rather than reporting an issue to their installer or Prodigy.

4) Even if someone talks to their installer about a driveability issue, there's no guarantee that the complaint will be forwarded to Prodigy. Depending on the person's ability to adequately explain the issue, the installer's desire to work with the person to properly understand the complaint, etc., the installer could either intentionally/unintentionally misinterpret the complaint and give the customer an explanation of the issue being "normal" that prevents the customer from continuing pursuit of a solution.

Ok so the prodigy guys got in around 1:45 and are still on it. Supposedly my guys mechanic had some sloppy install techniques. Seems like they had issues with oil breather tube routing. Also air filter mount was jacked too.

Stand up guys for making sure this right. I'll post an update later as I hear. I was told it would be perfect before they left.

I'm very pleased on how they have helped so far. Very cool
BK

Ok so the Prodigy guys worked til midnight last night on the rescue mission. Turns out the soon to be unemployed mechanic had half assed the manifold install and finger tightened bolts. Oil vapor was also getting into the intake some how. So lots of cleaning and double checking. Apparently we had two parts that were problematic that are due in tomorrow.

They dropped back to two tunes ago and it's supposedly running ok. They are soft riding for 100 miles or so to break it in. I'm supposed to pickup Friday.

I'll say this Wes and Dan are stand up guys and went way beyond to make this right for me. The guys really stand behind the product.

I'll post more as I get it!
BK

Sounds like this mechanic messed up more with your install than I did with my own install! I actually just had my second bad experience with a dealership messing up a warranty repair (not properly re-assembled AND additional damage caused during the initial "repair"), and your story is not helping me regain trust in professional mechanics. I wish I had a nice garage with plenty of space to work, fully stocked with tools, and a lot more experience to be more confident in tackling any job on my vehicles.

What's the reasoning for running an older tune? Why is it running only "ok" rather than "great"? Any indication of whether they got any new info from your vehicle to contribute to improving the tune?

I bet you can't wait till Friday!

I think Wes was wanting the old tune in as a baseline. The shop owner was to drive under half throttle for 100 miles to get the computer trained. I think those guys are coming back by today or tomorrow to check on it again. I was lucky that my install was en route to an appointment they had north of me.

As far as the Ok versus great. I really don't know its not great as I haven't driven it. Maybe poor choice in words as its second hand. Friday can't be here fast enough!