fuse pull on 2012

[VQ35DE]

I agree. Looks like the trunk fuse has to be pulled also.

[The Stig]

Originally Posted by VQ35DE

I agree. Looks like the trunk fuse has to be pulled also.

If the trunk fuse needed to be pulled, don't you think the GM engineers would have realized that when they discovered the fuse pull 3 years ago?

[tonyko1]

Originally Posted by NFERNOSS

Now, am I an electrical engineer? No, a 32 year GM Tech, which means I repair engineer mistakes in my employers eyes. I specialize in electrical repair and do 99% of the Corvette work here, which includes the classics (I have a '66' 427 Convertible sitting in one of my stalls as we speak).

The first piece of info is correct. There are no octane (or fuel) tables. It uses spark timing tables to adjust for the variance in octane. Seeing no spark knock from the sensors "should" allow the ECM to go back to the High Octane table.

The piece with the dyno graph. The author doesn't know what he is talking about. There is no VVT on the L99's. Only displacement on demand (DOD), which any L99 owner will attest only comes into play during certain cruising situations and coastdown for the most part. My '09' 4WD is Procharged and I have it turned off, makes no difference in fuel mileage.

The last piece which mentions the LS1. That PCM uses a completely different system. There are only two fuses, one for battery supply, the other is ignition to turn on the PCM. Here again, I owned at one time a 2004 GTO with the LS1 that was running a Maggie with meth injection and nitrous. I know the system well, as I spent many hours with my HP Tuners program messing with it. It's two octane tables were set identical so as not to go into a low performance issue (some with tunes have commented about this here already).

If you look at my schematic, the F10RA fuse supplies constant battery voltage to the ECM. The F20UA fuse is powered up by the "Ignition Run Relay" which the BCM switches on being the Power Mode Master. The F5UA fuse then gets power along with other fuses on that circuit for other items when the ECM closes a ground within itself to power up the Engine Controls Ignition Relay, this also totally powers up the ECM.

Sir, thanks for sticking to your guns. It is hard to argue with the physics of electricity and its movement, but quite an effort has been directed your way to prove otherwise.

Like I stated earlier, I did the fuse pull after reading about it, figured my dealer put 87 regular octane in it. I didn't notice a thing, a few of us admit as much.

You do what you can, and that's about all you can do.

Thanks.

[The Stig]

Originally Posted by tonyko1

Sir, thanks for sticking to your guns. It is hard to argue with the physics of electricity and its movement, but quite an effort has been directed your way to prove otherwise.

Like I stated earlier, I did the fuse pull after reading about it, figured my dealer put 87 regular octane in it. I didn't notice a thing, a few of us admit as much.

You do what you can, and that's about all you can do.

Thanks.

If you didn't notice a difference than your dealer probably put in 93 (or 91 depending where you live).

[CamaroKid300]

Originally Posted by SS_Matt

Can anyone confirm if the fuse pull process is the same on 2012 (LS3) as 2010-2011 LS3??

Originally Posted by dutchnrican

+1

Originally Posted by slick rick

same

Originally Posted by Gillespie12

Looking for what fuses to pull on my 2012 Camaro SS not sure what to do couldn't find anything

Originally Posted by a1cmatt

Hey let me know if you guys in the 2012 camaro ls3 do it. If you do let me know if you notice anything. Haven't got the car yet and I already told the dealer not to put gas in it but people are telling me to do the fuse pull anyway since it don't hurt. Let me know. Thanks

Originally Posted by stieger

Yes it is the same. Fuses #5 and #20

Yup, it is the same. I pulled mine.

[NFERNOSS]

Originally Posted by stieger

If the trunk fuse needed to be pulled, don't you think the GM engineers would have realized that when they discovered the fuse pull 3 years ago?

stieger, they did! That's the F13R fuse mentioned in the PIP.

[NFERNOSS]

Originally Posted by tonyko1

Sir, thanks for sticking to your guns. It is hard to argue with the physics of electricity and its movement, but quite an effort has been directed your way to prove otherwise.

Like I stated earlier, I did the fuse pull after reading about it, figured my dealer put 87 regular octane in it. I didn't notice a thing, a few of us admit as much.

You do what you can, and that's about all you can do.

Thanks.

I actually did do it to mine for shits and giggles also. No difference, but mine is a 2012 with the LS3 and a man pedal. The cars having the issues were the L99's with the A6, they have a TCM to deal with as well that the ECM has to send data to for proper shifts.

[The Stig]

Originally Posted by NFERNOSS

I actually did do it to mine for shits and giggles also. No difference, but mine is a 2012 with the LS3 and a man pedal. The cars having the issues were the L99's with the A6, they have a TCM to deal with as well that the ECM has to send data to for proper shifts.

Have you recently put 87 octane into your gas tank? If you haven't then you won't see/feel any difference after the fuse pull.

Both the LS3 and the L99 benefit from the fuse pull.

And maybe by pulling fuse #5 you no longer need to pull the fuse in the trunk. Making the whole fuse pull thing more convenient.

[Ben69]

What about zl1? Do you need to pull the fuse also?

[Ehmsea]

With as much as I've read on this (alot from PQ), I myself do believe this is possible. I did it with my 2013 SS LS3, but did not get anything more out of it. I had no reason to believe I was stuck on the low octane table, but what the hell, right.

Now seems to me, if you guys are so sure that it doesn't work; why don't you put your car to the test? Fill your SS with 87 Oct and run it thru, then fill up with 93 Octane and run it thru. Document your times 0-60; 1/4; dyno; etc on the 2nd tank of 93. Then pull the fuses and let sit over night. Redo the test...

I am curious about this as well, but the idea of running my SS thru 2 tanks of gas seems just too much for me to handle...

[strych9]

I came on here bent to discredit NFERNOSS's claims regarding the fuses. I have discovered that he's right. I studied the #5 and #20 fuses and circuits. They only supply power to the ECM when the ignition is switched on. Therefore, you would be virtually performing a fuse pull every time you shut off the car. These fuses do not supply memory power (constant), but rather switched supply power to the ECM.

Based on this new information, I have to also question why pulling these fuses has any impact at all on the performance.



Fuse #5:


Fuse #20:

[VQ35DE]

The PIP does show one of the two to be pulled as part of the fuse block located in the trunk. They do not list #5 fuse as one to be pulled at all.

[PQ]

Originally Posted by tonyko1

Sir, thanks for sticking to your guns. It is hard to argue with the physics of electricity and its movement, but quite an effort has been directed your way to prove otherwise.

Can you point out this effort exactly?

There is no 'Effort' against him. I've asked from the very beginning for someone to come explain it. He's tried and I have questions.

Until someone can explain why my car had the immediate and documented proveable gains it had then I believe the fuses (or ONE of them) made a difference.

Mine is a 2010 so maybe they did in fact do something different on the next model years.

And explain the engineers that came down to find the problem?

The fuse pull was my thing. It was my pull that blew this thing wide open. And all I've ever asked for is answers. Now we have more info but no answers.

If anyone doubts my original results please say so. I'm not sure how you can but please say so.

As far as trying to somehow discredit NFERNOSS, you are reading something into this that isn't there. As I said before, I'm just a guy who bought a car that was WAY under-performing until I tried a trick I was told about. It worked and I reported it.

I'm not going to be baffled until someone shows me that the 5 AND 20 fuses on a 2010 model year can't possibly have reset anything.

Originally Posted by strych9

I came on here bent to discredit NFERNOSS's claims regarding the fuses. I have discovered that he's right. I studied the #5 and #20 fuses and circuits. They only supply power to the ECM when the ignition is switched on. Therefore, you would be virtually performing a fuse pull every time you shut off the car. These fuses do not supply memory power (constant), but rather switched supply power to the ECM.

Based on this new information, I have to also question why pulling these fuses has any impact at all on the performance.



Fuse #5:


Fuse #20:

Did it change from 2010? I can't imagine it but I guess it's possible.

[The Stig]

Originally Posted by PQ

Can you point out this effort exactly?

There is no 'Effort' against him. I've asked from the very beginning for someone to come explain it. He's tried and I have questions.

Until someone can explain why my car had the immediate and documented proveable gains it had then I believe the fuses (or ONE of them) made a difference.

Mine is a 2010 so maybe they did in fact do something different on the next model years.

And explain the engineers that came down to find the problem?

The fuse pull was my thing. It was my pull that blew this thing wide open. And all I've ever asked for is answers. Now we have more info but no answers.

If anyone doubts my original results please say so. I'm not sure how you can but please say so.

As far as trying to somehow discredit NFERNOSS, you are reading something into this that isn't there. As I said before, I'm just a guy who bought a car that was WAY under-performing until I tried a trick I was told about. It worked and I reported it.

I'm not going to be baffled until someone shows me that the 5 AND 20 fuses on a 2010 model year can't possibly have reset anything.

Did it change from 2010? I can't imagine it but I guess it's possible.

Exactly. If the fuse in the trunk is really the one that controls the ECM memory than why/how did the engineers come up with #5 and #20?