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

[Stormyone]

Originally Posted by elcapitan1110

Read the OP.

Let me clarify, I am not attempting to be a smartazz, however the info is conflicting given the testimony of the camaro owners on this thread:
http://www.camaro5.com/forums/showthread.php?t=98810
many who said they switched from low octane gas to high octane gas and felt a difference almost immediately.... that is why I asked the question again....

[mycamaroisred]

I have the ss manny so the fuse pull will help cuz I think the dealer put low oc in I think so if I pull 5 and 20 how long do I keep the fuses out for plz PM me or email me wat I have to do cuz I don't always get back to some threads thanks

[BackinBlackSS/RS]

Originally Posted by Stormyone

Let me clarify, I am not attempting to be a smartazz, however the info is conflicting given the testimony of the camaro owners on this thread:
http://www.camaro5.com/forums/showthread.php?t=98810
many who said they switched from low octane gas to high octane gas and felt a difference almost immediately.... that is why I asked the question again....

There is no doubt this is very confusing.

[Stormyone]

Originally Posted by BackinBlackSS/RS

There is no doubt this is very confusing.

Likewise from Mactruck who posted that he pulled his fuses and there was no difference...
http://www.camaro5.com/forums/showpo...9&postcount=89
So it does not appear to be as simple as it's made out to be...

[GTAHVIT]

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

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.

Originally Posted by csjcsj

So if you already have a custom tune you are saying DO NOT do the fuse pull, because it resets the ECM to factory specs?????????????? And you will lose your custom tune!!!!!

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.

Originally Posted by acatlover13

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?

Originally Posted by Caspers2SSRS

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.......................

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...........

Originally Posted by Stormyone

Let me clarify, I am not attempting to be a smartazz, however the info is conflicting given the testimony of the camaro owners on this thread:
http://www.camaro5.com/forums/showthread.php?t=98810
many who said they switched from low octane gas to high octane gas and felt a difference almost immediately.... that is why I asked the question again....

Originally Posted by GTAHVIT

I have a dyno tune on my car and I did the pull with no problems.

But, I don't think you'd need to pull the fuses...

The point of a tune is to maximize the air fuel ratio. so you should only have one fuel map.

But I can't say that for sure... that is my guess...

Cars with aftermarket tunes will not require a fuse pull. you have essentially removed the car's ability to use low octane gas. So if you have a tuned car, and use low octane.... you can damage the engine and it will knock and run like crap.

The fuse pull will not reset your ECM back to stock if you do pull the fuses...

The biggest concern for those of us with tunes is if you take it to a dealer.

Sometimes the procedure for dealers is to check the ECM for any updates and reflash it.... Hence removing the tune... So be careful when going to the dealer.

Otherwise this fuse pull is not applicable to tuned cars.

[GTAHVIT]

BackinBlackSS/RS,

woops, thanks.

[BackinBlackSS/RS]

Originally Posted by GTAHVIT

BackinBlackSS/RS,

woops, thanks.

[Mikamaro]

I've been driving my LS3 for more then 5000 miles now, and to be honest I've started with high octane fuel from the start, 93 and 91 only but I was curious to see what was the difference with regular 87 because with my 3800(v6) engine from my Oldsmobile there is a big diffence when it uses 93 vs 87, It get to run about 100 miles more on one gas tank.
So I did this test with the LS3 with no advantage what so ever. I've kept doing 340 miles per tank with no diffence in acceleration or distance. I did that in June and since then I've been putting 91 back in it. I always had a feeling that the car didn't read the high octane fuel properly since then. Yesterday I've pull the fuse and that feeling dissapeared as soon as I hit the gas pedal! For my next gas tank I will add 93 and repull the fuse again...I will keep using 93 from now on.
Thanks guys.

[GreyLS3SS]

Okay I have a stupid question this, I have not read completely through all 5 pages just 1&5 so if this is answered I am sorry. What if you live in an area that only offers 92 octane as the highest level of fuel you can get the fuse pull will not work? or does it matter what method the octane rating is figured at? Thanks

[BackinBlackSS/RS]

Originally Posted by GreyLS3SS

Okay I have a stupid question this, I have not read completely through all 5 pages just 1&5 so if this is answered I am sorry. What if you live in an area that only offers 92 octane as the highest level of fuel you can get the fuse pull will not work? or does it matter what method the octane rating is figured at? Thanks

Your are fine. You will stay in the high octane table.
Again, the only reason to do a fuse pull is if you have at one time had 87 octane in the car. If you don't know, do the fuse pull.

[elcapitan1110]

Originally Posted by Stormyone

Let me clarify, I am not attempting to be a smartazz, however the info is conflicting given the testimony of the camaro owners on this thread:
http://www.camaro5.com/forums/showthread.php?t=98810
many who said they switched from low octane gas to high octane gas and felt a difference almost immediately.... that is why I asked the question again....

Yeah, I wasn't trying to be rude or anything either. Sorry it came off that way

[Stormyone]

Originally Posted by elcapitan1110

Yeah, I wasn't trying to be rude or anything either. Sorry it came off that way

not a problem.... we're good....

[GreyLS3SS]

Originally Posted by BackinBlackSS/RS

Your are fine. You will stay in the high octane table.
Again, the only reason to do a fuse pull is if you have at one time had 87 octane in the car. If you don't know, do the fuse pull.

Thanks doing the fuse pull as I write this will let you know if there is any change. Because I don't think the dealer put high octane in it when I bought it.

[PQ]

Originally Posted by MacTruck

So just so I get this straight, those of us that only can get 91 octane are screwed here right?

No. I would assume there is just less chance for error. lol

Originally Posted by MacTruck

I tried it. Left them out for 3hrs. Didn't notice a difference.

Cool. You are fine then.

Originally Posted by 8ty8 ls1

i know i'm a little late on this thread, but, if pulling the #5 and #20 fuses effectively "resets" the fuel trim tables, would a dash hawk be able to do the same thing? I've heard that the product was able to do that. Would this essentially be the same thing?

What would the dash hawk be doing. If you know how to do it I guess.

Originally Posted by Mark H

Doesn't anyone else think this is a serious problem that should be taken care of.
My 2004 gmc Denali will self correct. In fact the computer will correct the octane table if you put 5 or more gal of gas in.

That's great for the Denali. But NO I don't see this as an issue. Contrary to popular belief, not all cars adjust automaticaly. There are still cars that won't even adjust down. They will perform HORRIBLY, and sometimes not at all, if you put low oct in them.

Originally Posted by elcapitan1110

GM only just recently acknowledged this as a problem. I'm not entirely clear on the technical aspects of it, but I'm sure they will eventually diagnose the cause and fix it.

imo, there's nothing to fix.

Originally Posted by 1camaro70

Custom tunes adjust the timing, the air fuel ratio and with automatic the shift points can be adjusted.
The computer has high and low octane table, which is selected based on knock sensor to protect engine, low table loss is about 20 HP, if you don't feel a difference you were probably on high octane table, high to low was like night and day in my car, as I believe it was with PQ and Scott.
If you don't believe this, fine never pull your fuses, you'll never know, only took 1 hour with mine, couldn't wait any longer to find out if it worked, it did.
Tuners can copy high octane table to low octane table and cure the problem, but then what happens if you get bad gas and knock sensor can not send you to low octane table to protect engine, I'll just pull the fuses after I get better gas, limping along without 20 HP for a tank or two.
some cars run 87 and have no problems, they modded with CAI, headers and exhaust and got much improved HP so loss of some HP due to low octane is OK, and gas is 20 to 30 cents cheaper.
Bottom line computer runs engine, computer protects engine, computer not smart enough to reset to high octane table, probably to protect GM from warrenty claims from us dumb consumers.
PULL your FUSES or just buy the V6 and save $5000 retail, and get same performance.

I agree with this.

Originally Posted by Stormyone

Someone said in the long thread that the late model builds were self-correcting... is there anyway to confirm that?

Ignore the long thread. That is the purpose of this one.

Originally Posted by BackinBlackSS/RS

This was incorrect information. As of right now this is still a problem for ALL builds. At least this is what PQ has found out.

Well, again. I took the info I was given and filled in the obvious blanks. In the OP I said;

Unless they changed the entire computer on these cars during production, (No way that happened) it appears that ANY SS Camaro will need to have the ECU reset (by fuse pull, or at your dealer) after using low Octane gas. Again, if you want the max performance from your car.

The main purpose of THIS thread is to let everyone know that there was NO dealer 'permanent' fix or computer flash for this issue.

It only makes sense that if they could fix it on the line, they could fix it at the dealer. (A computer issue anyway)

THAT part I'm just deducing. And if I were a gambling man (and I am) I would bet the farm on this.

Originally Posted by Stormyone

I have several times... both threads... which is why I asked for clarification and given that not everyone's experience has been the same.... I may have been born at night, but not last night....

THIS thread is to correct the info of THAT thread. BUT, deduce for yourself wether they've been 'fixed' on the assembly line or not.

Originally Posted by Stormyone

Let me clarify, I am not attempting to be a smartazz, however the info is conflicting given the testimony of the camaro owners on this thread:
http://www.camaro5.com/forums/showthread.php?t=98810
many who said they switched from low octane gas to high octane gas and felt a difference almost immediately.... that is why I asked the question again....

Of course. He used a higher octane gas. The laws of physics still exist here. High octane gas will act different. If he were to pull the fuses he may get an even better result.

Originally Posted by Stormyone

Likewise from Mactruck who posted that he pulled his fuses and there was no difference...
http://www.camaro5.com/forums/showpo...9&postcount=89
So it does not appear to be as simple as it's made out to be...

If you are already on the high table then you obviously aren't gonna notice anything.

If you are not and don't 'notice' a difference, it doesn't mean there wasn't one. I always stated, I felt there was a difference but it wasn't strong enough I'd bet on it till I timed it. The difference isn't night and day. It's very subtle for the L99. If you've had your car for a while and were paying VERY close attention to it like I was, then you'd notice more, but I still had to time it to know for sure. Which tells you if you are ECPECTING it to be a big difference, you will be disappointed, but on the clock, it will be.