I'm a complete newbie and need direction

[TitanTn]

2017 Corvette Grand Sport - M7, supercharger, methanol spray, catch can, downpipes, custom tune, 93 oct

Something feels like it's restricting "normal" running, most noticeable when I shift into 2nd or 3rd. About 50% pedal and the car feels like it's on 7.5 cylinders. Hold the pedal in a consistent position and about 2 seconds later the problem clears up, the car is a "normal" power for the pedal position, and the car almost lurches forward because power was down the pedal position initially, but now is correct. If you run the car hard (like 90% throttle or better) it doesn't seem to be happening, or you just can't notice it.

Based on recommendations from the CorvetteForum, I ran my scanner this evening and recorded the behavior. I have no clue as to how to interrupt the data, but I'm hoping someone here can. I'm attaching a file. This recorded starting from 1st gear up through 3rd. Thanks for your help.

[SultanHassanMasTuning]

you need to list the exact mods

also attach actual read of ecu/file

injectors?
map sensor?
break-out (if centrifugal)
fuel system/booster

contact info below for any support

[TriPinTaZ]

I see it happening in the log but we need to see more channels in the log for a better look. In the log your Immediate Torque Commanded is jumping up and I think that could be what you're feeling. This could just be a Driver Demand thing but not sure, it could be more in depth.

Can you use my channel config and capture it again or at least add the torque PID's from my channel config that you're missing? Specifically the ones with Driver Demand Torque Requests. Then post your tune file and new log or email it to one of us that is willing to help. You're in good hands with Sultan, he knows what he is doing with that kind of setup so if he is willing to help, I'd suggest taking advantage.


Taz2.Channels (2).xml

[TitanTn]

you need to list the exact mods

also attach actual read of ecu/file

injectors?
map sensor?
break-out (if centrifugal)
fuel system/booster

contact info below for any support

I'll do my best to give you what you're asking for - thanks for your help.

I've attached the current tune file (I think that's what you meant by ecu/file). The supercharger is a vortech charger kit made by A&A corvette, V3 SI. The methanol spray is ALKY Control single 50/50 spray. DMS breakout harness, Mighty Mouse catch can, American Racing X-pipe and headers.

Stock injectors, stock MAP sensor, fuel system is stock.

I hope this is what you're asking for. Thanks again.

[TitanTn]

Ok, so maybe I won't be hearing from the Sultan on this thread anymore, I'll try to contact him directly.

In the meantime, I'll pursue all offers for help which includes getting the PIDS requested by TriPenTaz. My struggle with this one is that I'm not sure what to do with the XML file. Could you tell me what to do with it, or just tell me the PIDS you want to see and I'll see if I can add them to my log file. Thanks,

[eXo3901]

Download the provided channel config xml and save it here "C:\Users\*USER*\Documents\HP Tuners\VCM Scanner\Channel Configs".
Then, in the scanner channel list at the top click the folder with a gear and click "Open Channel Config". Navigate to "C:\Users\*USER*\Documents\HP Tuners\VCM Scanner\Channel Configs" (if it does not open to that location). Click the channel config xml you just saved there and click open.
Then, connect to vehicle, repoll for supported parameters, and start a log.

[TitanTn]

Download the provided channel config xml and save it here "C:\Users\*USER*\Documents\HP Tuners\VCM Scanner\Channel Configs".
Then, in the scanner channel list at the top click the folder with a gear and click "Open Channel Config". Navigate to "C:\Users\*USER*\Documents\HP Tuners\VCM Scanner\Channel Configs" (if it does not open to that location). Click the channel config xml you just saved there and click open.
Then, connect to vehicle, repoll for supported parameters, and start a log.

Perfect. Thanks for that. I uploaded his Channels and recorded some more runs. These were not the "perfect" runs - meaning I don't feel they perfectly represent the consistent issue, but it's similar and is most likely the same issue manifesting itself a little differently. Anyway. Here are 3 runs from today.

[SultanHassanMasTuning]

those are very small examples of what we want to see

[TitanTn]

Sultan fixed me up I think. I don't know what all the issues were, but he something about torque Mgmt and that the timing was hacked up. I have a new tune file and with a 5 minute test run, it's WAY smoother than it was. I don't know where I am on power, but for now I'll just enjoy smooth driving. Thanks to everyone.

[Random Dan]

2017 Corvette Grand Sport - M7, supercharger, methanol spray, catch can, downpipes, custom tune, 93 oct

Something feels like it's restricting "normal" running, most noticeable when I shift into 2nd or 3rd. About 50% pedal and the car feels like it's on 7.5 cylinders. Hold the pedal in a consistent position and about 2 seconds later the problem clears up, the car is a "normal" power for the pedal position, and the car almost lurches forward because power was down the pedal position initially, but now is correct. If you run the car hard (like 90% throttle or better) it doesn't seem to be happening, or you just can't notice it.

Based on recommendations from the CorvetteForum, I ran my scanner this evening and recorded the behavior. I have no clue as to how to interrupt the data, but I'm hoping someone here can. I'm attaching a file. This recorded starting from 1st gear up through 3rd. Thanks for your help.

WOW this sounds exactly like what my 2015 LT1 ECS kitted vette is doing.

[TitanTn]

WOW this sounds exactly like what my 2015 LT1 ECS kitted vette is doing.

Mine is way better, but not completely resolved. It's way smoother, but there are times the problem is still there. I'm not convinced if it's in the tune or some other mechanical issue. I'm taking a little break from it right now because I'm tired of it, but I'm sure I'll get back to it at some point. Update us if you find something on yours.

[eficalibrator]

It's doing exactly what you are asking it to do. Your driver demand table only steps to high torque request for the last two rows, which will feel like crap on the street.

[TitanTn]

It's doing exactly what you are asking it to do. Your driver demand table only steps to high torque request for the last two rows, which will feel like crap on the street.

It has a completely new tune from Sultan so things are different than what I originally posted. So it's better, not completely fixed, and maybe it's driver demand table or it could be something else. I'm not a Tuner, but from what people say, Sultan is very good at it.

[Random Dan]

I see it happening in the log but we need to see more channels in the log for a better look. In the log your Immediate Torque Commanded is jumping up and I think that could be what you're feeling. This could just be a Driver Demand thing but not sure, it could be more in depth.

Can you use my channel config and capture it again or at least add the torque PID's from my channel config that you're missing? Specifically the ones with Driver Demand Torque Requests. Then post your tune file and new log or email it to one of us that is willing to help. You're in good hands with Sultan, he knows what he is doing with that kind of setup so if he is willing to help, I'd suggest taking advantage.


Taz2.Channels (2).xml

Sorry if i'm hijacking the thread but this seems to be the exact problem I have ...

If I do a few scans with these channels, can you guys have a look? I definitely see it happening after a shift with rev match on and with rev match off it only seems to happen in 1st gear.

The only mods I have on my 2015 wet sump vette is the ECS kit with 8lb restrictor plate and the MAF baro break out, an eBay x-pipe, and a 160deg t-stat.

I'm totally new to Hp Tuners after giving up on EFILive so should I just do quick scan that just when I'm shifting or do I do a whole drive session scan?

[Random Dan]

Rev match on part throttle accel.hpl

Rev match on part throttle accel 2.hpl

Did I do this right? Should I start my own thread?

Edit: during the drive i just went on I noticed my tach jumping around. I cleaned and tightened the battery now tach i stable. However I think I should redo those scans. The attached scans were with a jumpy tach. I'll redo the scans tonight.

Thoughts...anyone?

[SultanHassanMasTuning]

very small samples for the issue

also your pedal is jumpy in the log

[Random Dan]

Yeah not sure if that is me doing it. Something different is happening now that I'm trying to do these scans. It is beginning to break up at high rpm, so I got some other issue to resolve before I proceed down the path of this thread. I'll be pulling the plugs to check gap. I looked at number 1 late last night and it is at .034"... what should the gap be?

[SultanHassanMasTuning]

i would recommend NGK 6510 gapped .030 or .028

breaking up can be from poor tuning as well

[Random Dan]

That is the plug I'm running. It was doing great WOT for a while (16K mi) except this will be the 2nd time I'll be regapping the plugs due to it beginning to break up. Is it normal to need to regap them?

[Random Dan]

I regapped all plugs to .030" they were all .034". The break up is all gone. I drove it right after the re-gap but made no log and it was making 8lbs of boost wed night. Last night I did make logs and it would not make more than 6lbs. Not sure whats going on there... But I also noticed the tach is bouncing like it has a loose battery cable again, Ugh. Cleaning and tighting didn't help.

Any way here is the log for what it's worth.

22-09-08 20-41-33.hpl