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Bringing this thread back up since a few of us were talking about it in another thread recently. Not that we have found a solution, but I can confirm that I have seen these same symptoms on my 09 C6...

Yes sir I can definitely confirm I had the issue on 100% stock exhaust with factory rear o2's in and turned on. If I get some time later on I will revive that thread and add my case in there. I feel...

I did have a completely factory exhaust and untouched o2 codes, but I did have 1300cc injectors. I first tuned the car completely stock and never noticed any weirdness in those rpm ranges, but as...

I didn't stay MAF long, but I was surprised when it still did the same thing on SD. My first event in the car was roll racing at StreetCar Takeover and I noticed it happening really bad when I would...

Since the stumble issue is so minor on my car and really doesn't bother me since it's usually one quick stumble after a pull I guess I'm not too worried about it. It is nice to understand why it does...

I know this is a few months old, but I don't come on here too often and there is a wealth of discovery in this thread. I work on mostly imports so don't use HPT too terribly much anymore, but...

First of all, you'll need to raise all the airflow limiters and torque/power limiters as you know. But, what seemed to cure the last of the throttle pull besides the limiters was under

Airflow >...

For the LSJ, on 80's and E85 you are most likely maxing the injectors out at that power level, even with a RSFS or BRFPS. If it is a stock fuel system with 80's then you are definitely well past 100%...

There should be no cuts in the LSJ PCM on a turbo setup. I run the stock 2.5 bar MAP sensor on mine and run up to 32 lbs, only thing I am held back on is I can only log up to 22.5 psi, but that isn't...

Yes, take a close look at the Pedal Power % Request table and the Expected Pedal table. Factory settings pull throttle down in the high rpms. Make sure that the 100% TPS column and the 3.1V columns...

Thank you for the reply. I definitely believe it doesn't want to hold up top. Mainly was just curious about the torque spike because I know a lot of the turbo cobalt guys used to make 440-450tq when...

Very nice! Are you guys purposely ramping in the boost and timing hard down low to crank out those torque numbers? I know on a lot of platforms guys like to bring it in a little softer to alleviate...

Nice results! Damn small turbo tq spikes lol. Just used HPTuners to tune a friend's CSRT4 last night, but just on 91. He wanted me to thank HPT for pulling through with this development after years...

Tuned my friend's CSRT4 last night with HPTuners! Went from the stock 9 lbs with intake/TBE to a dialed in tune on 16 lbs and 91. Its a totally different car now. With our crappy gas we ended up at...

I have a friend that is happier than you could even imagine right now. Good work guys! We will be out tuning as weather permits!

I will see if I can get a read from my friend's CSRT-4 too. A few months ago we got 2.25 and tried but encountered some errors and sent them in and were told HPT wasn't sure if you were going to push...

This is what he is referring too. The 2nd set of O-ring that are to be used on these injectors.

http://i235.photobucket.com/albums/ee138/Taylor_Redlines/ID1k.jpg

Im on my work computer so I can't view the tune but do you have Cat Over Temp and Piston Protection disabled? If not, that would be why the higher gears are richening up.

Id say that your g/cyl is most likely way high due to all the cylinder pressure being created by the excess of fuel trying to combust while its pegged at 10:1 AFR.

Did the car run fine before and...

Yeah I get what your saying. These injectors seem to be much more responsive than the 80's but also more touchy. I entered your over/underspeed and coastdown tables into my tune along with changed...

Thats another thing I was afraid of lol. Although it doesnt really bother me since I never really stab the gas from idle. It used to be really bad and would stumble in between a low rpm shift when I...

I like them a lot. Gave me a lot more headroom over the 80's on the stock system on E85. Area gave me some tips on how to get them to work when I got them so I didnt have to start from scratch. Still...

Area, Im going to try copying to the tables that you said you changed into my tune to see how it reacts if thats ok with you. It idles amazing on 7* of timing on these ID1k's, but I have a little...

Nice work! What kind of mileage are you seeing during all in town driving? I have an LSJ so we obviously dont have the cam tables but just messing with the timing table a bit has netted me 21mpg in...

Just post your tune up here so more people can see it. Are you running the stage 2 file with 60's?