2011 CTS-V Almost dies when coming to a Redlight. Just moved to warmer climate

[GHuggins]

the car was tuned with wideband in the tailpipe. the wideband is now in bank 1 sensor 2 location. b1 s2 is just ziptied up in engine compartment. not sure if wideband changing locations affect it but i moved the wideband well before the idle dipping starting.

Don't ever leave an O2 in fresh air just hanging and plugged in - IF IT IS still plugged in. Causes all sorts of problems. Unplug it and set codes to no error so it's ignored. Unplug the other bank too. Gotta keep it even if at all possible due to how they run test. Post O2 test run to 5000 rpms if not disabled on these. This will cause all sorts of self test and fuel sticking issues.

I'm a root cause person too. Reason I said to address fueling first. Airflow and torque control all of those things but as you stated to a degree - they all go hand and hand.

[ctsv2011]

Don't ever leave an O2 in fresh air just hanging and plugged in - IF IT IS still plugged in. Causes all sorts of problems. Unplug it and set codes to no error so it's ignored. Unplug the other bank too. Gotta keep it even if at all possible due to how they run test. Post O2 test run to 5000 rpms if not disabled on these. This will cause all sorts of self test and fuel sticking issues.

I'm a root cause person too. Reason I said to address fueling first. Airflow and torque control all of those things but as you stated to a degree - they all go hand and hand.

will get it unplugged this weekend and disabled related codes for it. ill tune ve against stft this weekend as well.

[ctsv2011]

added stock timing table back in under 1.00 grams of cyl mass and had a good 30 min drive home with no knock
also jumped on it a little and found car is getting 22.5 degrees on e48. this is about all the ethanol i can run because my stock pump. i dont think theres too much left on the table at 22.5 degrees on e48 is there? ive heard of guys running 24-26 degrees but thats on full E im guessing

[JayRolla]

added stock timing table back in under 1.00 grams of cyl mass and had a good 30 min drive home with no knock
also jumped on it a little and found car is getting 22.5 degrees on e48. this is about all the ethanol i can run because my stock pump. i dont think theres too much left on the table at 22.5 degrees on e48 is there? ive heard of guys running 24-26 degrees but thats on full E im guessing

What makes you think your pumps are maxed? Your fuel trims look good, your fuel pressure is good. I can run 80% on my stock fuel pumps hitting 12psi with my 2.4 pulley but I am at 6000ft elevation. I bet you can get away with some more E. I run 24.5* on e60 and above before I got diminishing returns.

[edcmat-l1]

added stock timing table back in under 1.00 grams of cyl mass and had a good 30 min drive home with no knock
also jumped on it a little and found car is getting 22.5 degrees on e48. this is about all the ethanol i can run because my stock pump. i dont think theres too much left on the table at 22.5 degrees on e48 is there? ive heard of guys running 24-26 degrees but thats on full E im guessing

I would also put your throttle follower table and your idle overspeed tables back to stock. I know for a fact that combo will run fine on a bone stock VVE. It's not proper but it will.

The combination of your idle overspeed table being so aggressive plus your low load timing having so much knocked out of it, that's the reason the timing just falls out of it on decel.

[sgod1100]

I would also put your throttle follower table and your idle overspeed tables back to stock. I know for a fact that combo will run fine on a bone stock VVE. It's not proper but it will.

The combination of your idle overspeed table being so aggressive plus your low load timing having so much knocked out of it, that's the reason the timing just falls out of it on decel.

I really would like to hear the TOONER's explanation on a stock cam/stock head car why those were changed. My ctsv is stock cam/stock head and I have never touch the throttle follower or overspeed/underspeed tables..

[sgod1100]

I agree. He has this car hitting 27* in the flex fuel table. Maybe he is always thinking the user will be under 80% because he does not add max timing till 80% E and only 62% timing at 50% E content. His low octane table actually had 1* more in the high load area than his high octane table. The same raped low to mid timing that makes absolutely no sense. He adds a lot back in the low mid area with the flex table but that would only be okay if the person is always on E.

I'm willing to bet he (DD) just copy and pasted shit into this tune and didn't even really look at it since it's so mildly modded compared to others. That's the thing though, he should be running ALOT more timing while just on pump gas and not on E..lol. I know you know that though...baffling huh..lol.

[sgod1100]

added stock timing table back in under 1.00 grams of cyl mass and had a good 30 min drive home with no knock
also jumped on it a little and found car is getting 22.5 degrees on e48. this is about all the ethanol i can run because my stock pump. i dont think theres too much left on the table at 22.5 degrees on e48 is there? ive heard of guys running 24-26 degrees but thats on full E im guessing

I'm on E55-60 running 15-16 psi right around sea level and while my fuel pressure does drop some, my afr stays rock solid. While this goes against the grain of many people I refuse to drill into the bottom of my tank for an aux pump. I'll get a ALM fuel hat if I want to add an aux pump. I've had zero issues with it. My ID1050s take up the slack with the IDC increasing. I'm at about 75ish IDC at redline.

[edcmat-l1]

I'm on E55-60 running 15-16 psi right around sea level and while my fuel pressure does drop some, my afr stays rock solid. While this goes against the grain of many people I refuse to drill into the bottom of my tank for an aux pump. I'll get a ALM fuel hat if I want to add an aux pump. I've had zero issues with it. My ID1050s take up the slack with the IDC increasing. I'm at about 75ish IDC at redline.

I've been tuning them that way for many years. I'm the same way. I'm not drilling people's gas tanks. Nope. Big enough injectors and you can make up for some drop in pressure.

Much of that calibration was just dumb. Not careless, or novice, dumb.

[sgod1100]

I've been tuning them that way for many years. I'm the same way. I'm not drilling people's gas tanks. Nope. Big enough injectors and you can make up for some drop in pressure.

That's exactly my thought process as well. You should have saw the crucifixion I went through on Facebook when I was saying that I wasn't going to run an aux pump...ohhh man...lol. I tried to explain to people I don't feel comfortable with that 3/8 npt ( I think that's the fitting size) threading into something that has a wall thickness of what, maybe a 1/4"?? Didn't sit well with me having just a few threads of engagement on something so important

Have you ever heard about DDtech tuning? That's who did it and some people will rave about him..

[edcmat-l1]

That's exactly my thought process as well. You should have saw the crucifixion I went through on Facebook when I was saying that I wasn't going to run an aux pump...ohhh man...lol. I tried to explain to people I don't feel comfortable with that 3/8 npt ( I think that's the fitting size) threading into something that has a wall thickness of what, maybe a 1/4"?? Didn't sit well with me having just a few threads of engagement on something so important

Have you ever heard about DDtech tuning? That's who did it and some people will rave about him..

Most of the population are idiots. There are far more idiots in the world than there are people of even moderate intelligence.

There are a lot of guys out there that just don't know what they're doing and people are too dumb to know. In the case of this vehicle here that's being discussed, the tooner actually caused the problems himself. That's not knowing what you're doing.

[sgod1100]

Most of the population are idiots. There are far more idiots in the world than there are people of even moderate intelligence.

There are a lot of guys out there that just don't know what they're doing and people are too dumb to know. In the case of this vehicle here that's being discussed, the tooner actually caused the problems himself. That's not knowing what you're doing.

You are definitely right. Just baffles me that some tuners out there can be so popular but do shit like this.

[edcmat-l1]

You are definitely right. Just baffles me that some tuners out there can be so popular but do shit like this.

I'm with ya. We have a local shop around here that's known for consistently not only screwing stuff up but blowing stuff up and people still go to them.

[sgod1100]

I'm with ya. We have a local shop around here that's known for consistently not only screwing stuff up but blowing stuff up and people still go to them.

rediculous...can't believe they are still in business. I've learned so much from guys on here (you included) just by reading a shit ton of threads and it's crazy to see so many well known tuners do things incorrectly

[sgod1100]

OP, you get the rpm dipping issue sorted out with the changes that were recommended on here?