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He could see the hiccup in the log, but at this stage in the tuning, not all the parameters are available to log. He also said there’s still a lot of power left on the table with the tune with regards to the afr, but I’d rather see this get fixed first before making any more power.

Several. He can’t figure out what’s going on with it. He told me to keep it on map 6 with 2psi across the board. Really defeats the purpose of the tune.

It’s gotta be some kind of ecu torque limit cut. I read somewhere these transmissions are rated for 368ft/lbs.

I have the power cut issues on map 1 too, but only from a stop and only in the 1-2 shift. It’s not as prominent as on map 2, and I think it happens more in the colder temps. During the summer I hardly noticed it. It feels like the ecu is cutting timing because of too much torque. Colder air...

Interesting. Easy enough to check for it, although all the log files show it’s making and holding full boost.

It only occurs from a standing start with full throttle on the 1-2 shift, sometimes 2-3 shift. Otherwise it runs fine. If I roll into the throttle it’s fine, even on map 2. I’m not sure if the Jeep is like other cars where the tune is torque limit based and it’s hitting that limit too fast, or what.

Do you need to get an alignment after installing the new LCA's?

So I pulled the spring out of the DV+ and only got one hesitation on map 2. The Jeep also felt a little more sluggish but I’m not sure if that was from the spring being removed or from the hot, humid weather (more likely).

I don’t see why not. I think the depth is almost 1/2”.

One thing to add about the DV+ spring as a potential issue is there are some guys running it with the spring and JB4 w/o any issues, and a couple using stock bov with the same issues I have.

Yikes. Thanks for the warning.

I was thinking the same thing. It’s simple enough to do too. Definitely on my to do list to get to the bottom of this.

I think it’s either pulling timing or throttle blade closing in response to either low fuel pressure or overboost/load. The JB4 can log data, but several parameters are not able to be logged currently, like fuel pressure and air intake temp. Burger is working on that, and we’ve been exchanging...

Definitely not the rev limiter since I kept it in auto, and It happens before the redline.

On a full throttle pull, especially from zero, and even from a hard 40-90 pull, the power suddenly cuts out and feels almost as if I hit the brakes suddenly. It feels like either spark is cut or the tb blade closes due to over boost or low fuel pressure, and then it resumes. On map 1 the power...

The hesitation is back on map 2, so I guess it wasn't traction control related. I'm wondering if it's mileage related, ie ecu torque limit for break in period. Oceanblue and Yellowssm, how many miles did you guys have before installing the JB4? I'm just under 5k.

I found that using the stock couplers and a little wd40 made the pipe install very easy. Disassembling the stock surge valve was difficult w/o destroying it. Have yet to try to spin tires though...lol.

Elevation definitely hurts. I’m at sea level. I’ve got the steel bumpers too. The Borla exhaust shaves a couple of pounds off too. This has a sub 7 sec run in it for sure on the other maps.

Yes, stock except for the jb4, intercooler pipe, DV+, and Borla climber exhaust. No larger tires or heavy equipment.

I did a lazy 0-60 of 7.27 today on map 1. Lazy as in I rolled into the throttle after I got rolling, so not too bad.