Superlift System + Flashpaq - EGR Module???

[07JeepXK]

My buddy with the 05 WK 3.7 running the 4 inch BDS and 3.73 gears had the AEV Module for about two years with no problems. When we did the gear swap he had to get the Hypertech Speedometer Calibrator. We tried keeping the AEV module installed and the tune with the Hypertech but his Jeep wouldn't allow both to be programmed at the same time. We ended up taking out the AEV module and he's now just running the Hypertech Speedo calibrator upgraded to the Maxx energy programmer or whatever it's called. He has had no ESP issues with the AEV module.

[Matt]

^^That's kind of what I was thinking would/should happen.... double programming just wasn't making sense. And if the main function of the EGR module is to correct for tire size to resolve ESP issues, well my Flashpaq does that.

I'll have to ask Jon to find out exactly what comes with the K864 Master kit. If the EGR is NOT included, then its easy enough to install everything without the EGR and see what happens. But if it is included, could probably save a few bucks by ordering the kit without the 5154 box (EGR)

Also wish Superlift would update their site; the picture shows the kit with the rear radius arm drop brackets instead of the new longer links.

[07JeepXK]

How does the flashpaq fix ESP issues?? I have the flashpaq and everyonce and a while the dash lights up like a Christmas tree when I'm making u-turns and what not. That all started after I added the 33's. I can get Jays AEV module for free so I'm not really worried about that. It just sucks because I don't want to lose the superchips tune.

[Matt]

ESP issues are associated to tire diameter changes. What diameter did you program into your computer? And whats the "effective" tire diameter? Measure from the center of your hub to the ground, that's the effective radius; double that for the effective diameter.

[07JeepXK]

ESP issues are associated to tire diameter changes. What diameter did you program into your computer? And whats the "effective" tire diameter? Measure from the center of your hub to the ground, that's the effective radius; double that for the effective diameter.

Yea I know that the ESP issues are related to tire diameter. When I installed the 33's I programmed the new tire size with the flashpaq before the XK even left the garage. I measured the tire diameter two ways. First I measured from the ground up to the top of the tire. Then I measured by making a chalk line on the ground and tire and pulled the XK forward until the chalk line on the tire made one complete rotation and extended the line on the tire to the ground. Now that I had to line on the ground I measured the distance between the two lines and used the formula to compute the tire diameter. That number was within 1/2 inch of just measuring the tire from the ground to the top of the tire. I then took the average of the two measurements and came up with a solid number for the tire diameter. Plugged that number into the flashpaq and the speedo is dead on with gps. I also paced a stock vehicle to make sure both speedos were reading the same mph. I can't remember what they measured but I think it was somewhere around 32 inches for the 33's.

[Matt]

This goes back to my original question about "what does the EGR" module actually do.

If it just reprograms for tire size, like you did, then your ESP issue won't be solved and you may even have a sensor that's slightly out of range causing your problems.

[07JeepXK]

Exactly. I bet that's all it really does. I think a call to AEV is needed because I can't lose my Flashpaq. My jeep doesn't like the stock tune for some reason. If its not tuned to 91 octane the tranny shifts really bad (not tire size related).