Will do. I notice in my iphone gas listings that some are more than 20 cents higher jumping from 87 to 91 (we don't have 85 or 93 easily available out here). Since putting in the 87 performance tune, I am getting right on the edge of 18 mpg, combined, but mostly freeway, driving. In SoCal we rarely go anywhere without a freeway involved.

That's up 1 to 2 mpg roughly, for me. I am driving about the same speeds as before, maybe a little faster, because I don't have to kick in passing gear as often to get the power I need.

I never noticed a huge difference in the tune, but overall it just seems to drive smoother and easier. When my current tank gets low enough I will try the 91 and see what I get.

 

Hmmmmm....I remember you talking about this before. I'm paying $3.46 up here right now for 87... That's the cheapest around and the 87 is all they offer. I'll have to think about this a bit more....

 

So has anyone else here not been able to recalibrate speedometer?
I've been patiently communicating with a superchips rep, but it's starting head in the must be something wrong with your jeep direction. I told the tech. that several people on the forum have had speedo issues & had them resolved.
He asked if I could get the trouble ticket number to compare against my issue.

Any help here would be appreciated. The only DTC's I get are when I adjust my tire size. THe other odd thing is the speedo doesn't work after returning to stock. When I go back to a performance tune without calibration, then the speedo returns. I've done this three or four times now and the speedo function lags one program step behind.

Thanks in advance for any help.

 

That really seems like one of two things. Either the PCM came programmed from the factory with a set of gears that shouldn't have been there for the model, or somehow when going back to stock the tuned gear set didn't change (doubtful).

Way back at the start of this thread, the issues you are mentioning sound much like what I experienced. The Flashpaq saw the factory gear set that was programmed in for the vehicle as something that shouldn't have been available. After tuning, it would disable the speedometer. It was resolved pretty quickly, but it still put me a bit into panic mode. Better yet was when it did take, and the speedo was just way off.

I would make Scott@superchips on this forum aware, call Ron Rapp in Support bright and early Monday morning and ask them to get it into the engineering people. I don't know what their course of action will be, but somewhere something is mismatched and your Jeep may very well have came that way from the factory. Who knows, but that's where I would start.

If you don't think things are progressing well on Monday, send me a PM and I'll see what I can do.

 

Yeah when I hooked it up the first time & changed the tune & tire size at the same time, I got the 0mph speedo thing. I thought of your post. (that's what put me over the top on getting it) It seemed like the same thing. But it looked like yours started working after returning to stock. Mine always lags one program behind. There was an unrelated code for a weak spark/ignition the first time I checked for codes. I had four the other three were implausable right left & speedometer input.

So they suggested that the weak spark code may have an impact. I thought codes stayed on the ecu untill cleared. If that's the case, I was wondering if taking the battery down too far once caused that code.

It hasn't given that weak spark code again since clearing, just the sensors & speedo codes.

I feel like it's the tuner, since I can get the speedo to work if it thinks the stock tires are installed. I'm oversimplifying things i'm sure, but I thought the sensors were just counting rotations similar to a bycycle speedometer.

I hope I can get this sorted out. The speedo calibration was the most alluring feature to me. I didn't have high hopes for performance gains. the funny thing is I was floored by how much difference there was at the 87 octane tune, just by shuffling around some ones and zero's. It really woke up the transmission. It seemed like it was programmed to get into overdrive no matter what the cost. Now It comes out of overdrive without having to gas it so much that it wants to jump two gears.

 

Hey Gene,

Definitely something wrong with what they think they should be reading as stock.

Anyway, PM sent and I'll see what I can do to help you out.

 

That's pretty steep for gas, but the rest of us don't get a check from the oil companies mandated by, a socialist, or shall we say robin hood type governor.

BTW, I think you should run with the 87.

 

I replied to your PM.

When I was typing out how restoring to stock still required me to change the performance tune before the speedo would respond, I though why not use the same method for different tire size & see what happens.

It worked. So for whatever reason, be it my jeep or the tuner, it will calibrate the tire size but not the time I change it.

So I tuned to 91 and calibrated the tires & busted my speedo. Changed the tune to 87 & left the tires alone & then the speedo came back to life.

 

So I've had my Super Chip 87 octane tune in for a whole day and here's my initial impression:

I wanted to get the Super Chip pac before my wheels and tires so I could do a more apples to apples comparison.

First I have an automatic, and when I read that it helped alot with it... I wanted to believe....


I'm happy to report I'm a Believer!

After today.... I feel my Jeep had a mind of it's own for the last 30,000. I was always fighting the computer. I would push the gas, and it would lug causing you to keep pushing the gas peddle further than you should for it to down shift. Then when it did shift you then had to let out of the throttle a bit to achieve the acceleration you wanted, or let off to much and it'd shift back up..

I am now in control of the gas peddle! When I push the peddle just a bit, it down shifts as I'd expect it should. It makes the Jeep way more drivable for me.

l also notice a tad more zip, but the big payoff was the downshifting when it should, not when it felt like it. I'm in control again! I'm hopeful the zip will make my 4.10's and 35s livable.

I'm sure Jeep engineers programed the stock computer to hold high gear as much as possible for the EPA loop to get a better rated MPG, but that makes for a less than stellar driving experience.

I just want to state again, I am very happy after just one day with the shifting aspect of the flash.

I'll have to see if I get better MPG or not, but not a big concern of mine.

 

I'm pretty sure I read somewhere that today, the 15th, Superchips was going to release the TPMS disable option.
I'm downloading the latest update right now.
It gives you the option to download " TPMS disable".
YAHOO!!
I'm going to try it and report back!