Fuse Pull: Low Octane Fuel Fix For L99 and LS3. Reset Fuel Map for High Octane Fuel.

[ls2gto]

[QUOTE=radz282003;846892]I've been thinking about this too; I guess we'll all find out. I suppose, as long as GM is working on this, this simple procedure isn't too big a deal to do once-and-a-while.

IMHO - I've learned a lot from the G8 boards too, and if you contribute like this here, please don't go. I think we could all benefit from one another



Thanks. I was originally going to buy an L99 SS. Then, when they pulled the plug on G8 production in April and were giving ridiculous discounts in July, not to mention my dealer offered me a heck of a trade-in on my GTO, I could not resist and picked up a silver G8GT. Anyway I agree the boards can sure help solve problems.

[third1]

Originally Posted by wh0rsep0wer

I disagree. This isn't a "MOD" it's a "HACK" - the digital equivalent of a duct tape fix.

I agree, we as consumers shouldn't have to do this to make our cars run rite. GM should come up with a pemanent fix........

[GMRULZ]

Originally Posted by Tillman Speed

It would be nice to get a back to back dyno with fuses pulled in between runs
Chris

Here ya go, picked up 8 rwhp after sitting for 5 minutes w/ the fuses pulled on dyno after the first 2 runs. I didn`t have one of the slow ones though, I`m sure they picked up more. Link:

http://www.camaro5.com/forums/showthread.php?t=36837

[Yaz]

Originally Posted by third1

I agree, we as consumers shouldn't have to do this to make our cars run rite. GM should come up with a pemanent fix........

I agree, What about all the owners spending hard earned cash on 94 octane for nothing for months because it doesn't relearn the dealers cheep mistake. It was not a honest mistake if a dealer does not have a policy to fill with recommended octane fuels for performance cars any turbo cars. Most sell Corvettes and used turbo cars so that's a big no no. IMO if it was known, a reference to this one way feature should be in the owners manual as to having it reset and a indicator light or message should be displayed.

You wait, there will be a updated ECM flash that will go high and low in the tables before long.

[PQ]

Originally Posted by GMRULZ

Here ya go, picked up 8 rwhp after sitting for 5 minutes w/ the fuses pulled on dyno after the first 2 runs. I didn`t have one of the slow ones though, I`m sure they picked up more. Link:

http://www.camaro5.com/forums/showthread.php?t=36837

Hmmmmmmmm, going back to my dyno thread, I wonder what mine would read now?

[solo40oz]

Originally Posted by 2011RS/SS

Anybody that puts 87 octane in a V8 period should be bitchslapped. It redicious that the dealers have been putting cheap gas in these cars just to save a few bucks.

You should only have to let the fuses set out a hour at the most. The purpose is to wait till all the capacitors in the computer has discharged. When current is reapplied to it and the car is started up, it then begins to relearn its tables..

octane has nothing to do with the quality of the gas......think of a higher octane rating as a 'delay' element that keeps the fuel from igniting until full compression has been achieved

so basically - low compression engine = use lower octane
high compression engine = use high octane

but yes, I agree...anyone putting 87 in THIS car should be slapped

[radz28]

Originally Posted by wh0rsep0wer

I disagree. This isn't a "MOD" it's a "HACK" - the digital equivalent of a duct tape fix.

Originally Posted by Tillman Speed

To answer, yes there is both high and low octane in the beta software with LS3/L99 calibrations pulled up. This is a great thread, and helps people understand exactly how the spark calibrations work for LSx's. Keep in mind, there are also adders and subtractors based on engine coolant temp, intake air temp, graphed with rpm and g/cyl as the axis'.

9 degree (roughly) difference should for sure wake the car up. It would be nice to get a back to back dyno with fuses pulled in between runs and after letting it sit overnight on the dyno. As long as conditions are the same.

Great thread. I don't see any harm in pulling the fuses until GM comes out with a new Adaptive calibration and gives out reflashes. I woudn't call it a "MOD" either. But I wouldn't go as far as saying a "HACK" or "DIGITAL DUCKTAPE". I'm thinking it should be referred to as a "PATCH" before the dealer is involved and can properly calibrate.

Chris

I like patch, personally We'll call it Patch 1.0 until we get an update from GM, lol.

Originally Posted by ls2gto

Thanks. I was originally going to buy an L99 SS. Then, when they pulled the plug on G8 production in April and were giving ridiculous discounts in July, not to mention my dealer offered me a heck of a trade-in on my GTO, I could not resist and picked up a silver G8GT. Anyway I agree the boards can sure help solve problems.

Shoot - I considered the G8Board like my tutor toward the aftermarket, lol.

Originally Posted by third1

I agree, we as consumers shouldn't have to do this to make our cars run rite. GM should come up with a pemanent fix........

Give GM some time

Originally Posted by GMRULZ

Here ya go, picked up 8 rwhp after sitting for 5 minutes w/ the fuses pulled on dyno after the first 2 runs. I didn`t have one of the slow ones though, I`m sure they picked up more. Link:

http://www.camaro5.com/forums/showthread.php?t=36837

That's the one I was thinking of. If it's not added in the first post of this thread, I'll add it now

Originally Posted by solo40oz

octane has nothing to do with the quality of the gas......think of a higher octane rating as a 'delay' element that keeps the fuel from igniting until full compression has been achieved

so basically - low compression engine = use lower octane
high compression engine = use high octane

but yes, I agree...anyone putting 87 in THIS car should be slapped

Thanks for clearing that up. I'm sure most of us understood that, but a lot of comments kinda' glossed over those facts

[vdevine]

Reset mine last night, reinstalled fuses this morning, plugged back in the MAF(don't ask, just did it). Noticably better idle and reverse out of the garage....much smoother. Drove 60.5 miles to work with MPG average lamp on. I have been averaging 20.9 mpg during this very same trip. Going in to work I averaged 25.6 (less traffic) and coming home 24.1(more traffic). I can't say there was any real difference in acceleration as I didn't get on it.

This thread gets my vote for "Best thread to date"

[ls2gto]

Originally Posted by Tillman Speed

To answer, yes there is both high and low octane in the beta software with LS3/L99 calibrations pulled up. This is a great thread, and helps people understand exactly how the spark calibrations work for LSx's. Keep in mind, there are also adders and subtractors based on engine coolant temp, intake air temp, graphed with rpm and g/cyl as the axis'.

There's another good point- the temps here in DC lately have been in the 90's and I see lots of people from way south of here on the board. High temps inherently reduce power anyway but the computers also respond in a number of negative ways to high temps. For example, when a high temp condition in the engine or trans is detected, the max shift speed for the L76 A6 drops from 6000 to 5600.

[PQ]

Originally Posted by radz282003

I Give GM some time

Bad part is, I think this 'happening' here on Camaro5 may be the catalist to make it happen. How cool is that?

[PQ]

Originally Posted by vdevine

I can't say there was any real difference in acceleration as I didn't get on it.

Oh, you will.

[Bell040]

so are we recommending that LS3's do this too?

should I be worried that the ECM will have to "re-learn" everything?

[PQ]

Originally Posted by Bell040

so are we recommending that LS3's do this too?

should I be worried that the ECM will have to "re-learn" everything?

I can't speak as an expert but NOTHING else in my car visibly reset. Oil life, window indexing, radio, ........ nothing.

[Camar0wn3d]

Originally Posted by Bell040

so are we recommending that LS3's do this too?

should I be worried that the ECM will have to "re-learn" everything?

Some LS3's have reported that the fuse pull "patch" helps them. I did it last night with my LS3 and haven't noticed any real difference, but then again I never felt like the power was ever lacking.

You actually NEED it to re-learn everything to fix the problem (if yours is affected). If it's not affected, it will not hurt a thing...like I said before the effect is NO DIFFERENT than disconnecting the battery for a few hours or recovering from a dead battery...only by pulling these two fuses you don't have the annoying side effects (having to reset the window indexing, tone settings, etc.) because the BCM module and the radio never lose power...