***Updated Fuse Pull info, confirmed***

[PQ]

Originally Posted by Caspers2SSRS

I'm sorry, and I'm not trying to be contrite, but I'm still a bit confused on this whole matter...........why would, or better yet what do engine or for a matter of fact any modifications, custom tune or otherwise have to do with the loss or gains of over all engine power, directly related having to do with using the unrecommened fuel, with its lower octane rating, and the fuse pull trick....? One inquiring mind needs clarity..........as to the connections or better yet how modding the car exempts it from the previously mentioned issues and a resolution to those performance problems by simply resetting the ECM via fuse pulling. Or are you attributing the custom tune and somehow the new programming lowers the octane threshold so that the car runs fine and equally on low, mid and high octane, and that the ECM is now programed to self diagnose and adjust itself so that the engine performance remains the same no matter the fuels octane rating. Sorry if the questions seem redundant...............Casper

I'll do my best to try and understand at least the first part of your question.

It's not the make-up of the fuel it's self that causes the difference in performance. It's what the car does with the difference in the make-up of the fuel.

[Scott@Bjorn3D]

Originally Posted by acatlover13

The stock ECM has two settings: low octane and high octane. In a perfect world, the stock ECM would reset itself for optimum performance depending on which type of fuel was being used. Unfortunately, our 2010 SS Camaros don't seem to do this. These cars are almost completely controlled by these computers (we as drivers are able to do just enough to make us THINK we are in control....LOL). When I added the mods and had the custom tune programmed, there is no longer any need to do the fuse pull, since it would set it back to factory settings, and the factory settings are no longer optimum for my car. I would therefore have to reload my custom tune, if I were to pull my fuses at this point.

No that should not be the case. A custom tune changes the programming of the ECM. Pulling the fuses should not do anything but reset the car to high octane table if low. If you would lose your tune you would lose it when your battery dies. Not cool, that is why the programming is flashed into the non volital program memory.

[Supermans]

Originally Posted by PQ

From our experience and the way it seemed with the engineers findings on Scotts car, I"m guessing they just didn't know. And didn't want to even START to guess, because of the firestorm it could create. So I'm assuming they just wanted HARD facts before they said anything. What I was told at the fest was basicaly that it's been taken care of. If that means DON'T put low octane gas in your car, then so be it. After seeing the pissing and moaning caused by little things like the headlights, ABL, brake weights, and that cracked nose piece, I would be scared to say anything if I was them too.

But that's just my guess.

Oh, and you saw that I finally kicked the habit right?



I have driven cars that will bog and drive like crap bucking a kicking if you put low grade gas in. I'm just glad it at least adjusts DOWN.

Congrats on kicking that nasty habit I know how very hard it must have been, but you and Bonnie are in great shape and your lungs/body will recover fully in no time to full capacity. In a sense by quitting smoking, you did a fuse pull on yourself Oh and btw, I had a kick reading your thread about stick vs manual. Epic and hilarious. I love the video you made as well. I'm glad I switched from manual to an automatic. I feel more relaxed when driving and I notice that I keep my eyes on the road a lot more as well so it's safer in that regard. Even though I'm a Mustang owner once more, I'll always have a sweat spot for my Orange SS in there.

Originally Posted by Scott@Bjorn3D

No that should not be the case. A custom tune changes the programming of the ECM. Pulling the fuses should not do anything but reset the car to high octane table if low. If you would lose your tune you would lose it when your battery dies. Not cool, that is why the programming is flashed into the non volital program memory.

That's what I thought as well.. Scott, how is Stephanie doing? I'm not on this forum as much as I used to be, so I am missing out on updates. My prayers are still with her and your family.

BTW, you and PQ (including Stephanie and Bonnie too) are my favorite people in this forum. Both of you have really done so much for this community in helping others out and never giving up hope.. I definitely look up to both of you and how you treat your families and others in this forum. I just wanted to get that out while I am replying to both of you in the same message. Take care and God Bless..

[PQ]

Originally Posted by Supermans

Even though I'm a Mustang owner once more, I'll always have a sweat spot for my Orange SS in there.

Well, you definitely picked the right time to get one. lol

[PQ]

Originally Posted by Scott@Bjorn3D

No that should not be the case. A custom tune changes the programming of the ECM. Pulling the fuses should not do anything but reset the car to high octane table if low. If you would lose your tune you would lose it when your battery dies. Not cool, that is why the programming is flashed into the non volital program memory.

I'm guessing a smart tuner would set the tune as the default settings.

[OBSSEST]

1.) The custom tunes which I have looked into (Janetty and Vector) appear to copy the HIGH octane table over the LOW octane table, making them identical. I am not familiar with tuning enough to know if other tuners do it this way. If the tables are identical, the fuse full won't do anything.

2.) I don't think that pulling the 5 and 20 fuses with a tuned car will set the car back to factory and make the tune go away. If this were the case, that would be the method for going back to your FACTORY tune, rather than having to copy your OEM tune back to the car. Can anyone clarify whether this would affect the octane tables on a tuned car?

3.) There's no way that there is over a gallon of fuel left in the hose of a gas pump after it is turned off. If that were the case, you could go to each pump and get a free gallon out of it from the last guy that used it without even turning it on. Next time you go to the gas station, squeeze the handle onto the ground before you turn it on and see how much fuel actually comes out.

[Speedfreak]

Originally Posted by Scott@Bjorn3D

Guys here is the thing to remember. Most dealers PDQ the car, they come with little gas so they will go down and put 3 or 4 bucks of 87 in. Guess what they just did to test the car, put you in the low octane table. The car will not come back up on its own.

So when that sales man takes you down and you put 91 or 93 for your free tank of gas it does no good since the car does not relearn.

Also you have to remember that sitting gas will lose its octane levels over time. So allways try to go to name brand stations that are busy most of the time. That means the chance of getting stale high octane is rare.

That makes no sense. NO other LS powered vehicle is that way.

[acatlover13]

Originally Posted by Scott@Bjorn3D

No that should not be the case. A custom tune changes the programming of the ECM. Pulling the fuses should not do anything but reset the car to high octane table if low. If you would lose your tune you would lose it when your battery dies. Not cool, that is why the programming is flashed into the non volital program memory.

That's actually good to know! I was told NOT to pull the fuses again because it would disrupt the settings of the tune, but perhaps I misunderstood and that was just because pulling the fuses was completely unnecessary.

However, your post suggests that I may still need to reset the fuel tables if the performance drops due to low octane or bad gas. Quick clarification?

[BackinBlackSS/RS]

Here is a thread where an A6 owners says his car automatically switched from low to high octane table without doing the fuse pull.

http://www.camaro5.com/forums/showth...=1#post2183375

[solo40oz]

Well, I'd just like to say that 'we don't love them hose'

Originally Posted by x626xBlack

Note: All grades same handle, same common line.

[bi11ymc]

Originally Posted by Pontiacfanatic66

Uhhh I was joking. I did pull my fusses and re placed them with the originals. LMAO

You never know around here.

Hey, I love Pontiacs

This was my first love (1978 T/A 6.6 220hp/325tq):

[Caspers2SSRS]

Originally Posted by acatlover13

The stock ECM has two settings: low octane and high octane. In a perfect world, the stock ECM would reset itself for optimum performance depending on which type of fuel was being used. Unfortunately, our 2010 SS Camaros don't seem to do this. These cars are almost completely controlled by these computers (we as drivers are able to do just enough to make us THINK we are in control....LOL). When I added the mods and had the custom tune programmed, there is no longer any need to do the fuse pull, since it would set it back to factory settings, and the factory settings are no longer optimum for my car. I would therefore have to reload my custom tune, if I were to pull my fuses at this point.

So as to understand this scenario as you've explained it................The Custom tune sets the performance parameters of the car to the use of high octane, and thus wouldn't perform equally as well on a lower grade? In as much isn't it true that a custom tune removes the factory settings entirely from the ECM and therefore if a dead battery or fuse pull scenario would apply, as you infer..........The car would be, for a lack of better words.......Brain Dead and not set back to factory settings. Its difficult to believe that a fuse pull or dead or removed battery scenario, would erase the ECM program settings.......................

I'll do my best to try and understand at least the first part of your question.

It's not the make-up of the fuel it's self that causes the difference in performance. It's what the car does with the difference in the make-up of the fuel.

Your explaination seems to suggest that the car wouldn't perform as well, on a fuel with a lower octane level, disregardless of whether or not, a tune other than factory settings have been flashed into the ECM...correct? .........and in as well, a particular car with particular modifications would need an entirely different set of ECM parameters set into it, in order it gain maximun gains from different levels of octane fuels......and the fuse pull would be fruitless...........

[PQ]

Originally Posted by Speedfreak

That makes no sense. NO other LS powered vehicle is that way.

Makes no different. No other LS powered vehicle uses the same computer.

Originally Posted by Caspers2SSRS

Your explaination seems to suggest that the car wouldn't perform as well, on a fuel with a lower octane level, disregardless of whether or not, a tune other than factory settings have been flashed into the ECM...correct? .........and in as well, a particular car with particular modifications would need an entirely different set of ECM parameters set into it, in order it gain maximun gains from different levels of octane fuels......and the fuse pull would be fruitless...........

This is correct. If you have your car tuned, and the tune is a good one, a fuse pull shouldn't do anything for you. AND the use of low grade fuel should not be recomemded, unless, for whatever reason, it's tuned to use low grade fuel.

[MG]

It bothers me that GM still hasn't fixed this problem. What gives? One of the main reasons I waited to get the 2011 MY was so that glitches like this would supposedly have been taken care of. Now I have to keep constant vigilance on what octane level gas is put in the car. Damn!