Fuse Pull: Low Octane Fuel Fix For L99 and LS3. Reset Fuel Map for High Octane Fuel. - Page 83 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Nomad · 10-13-2010, 03:27 PM

Quote:

Originally Posted by camaro_eddie

Does anyone know with certainty if they are tuned from the factory for 91 or 93 octane. I have been having a debate about this with some friends. I say it is 91 since that is more accessible to get and what is recommended in manual 93 octane will only be a better fuel for the best possible performance. He is saying that it is tuned for 93 and is shipped from factory with 93 in it. I am trying to find out for sure.

Hi Eddie,
I worked in the Facilities department at the Car Plant in Oshawa until July, 09. If memory serves, they only had Mid-Grade (89 Octane) gas in the bulk tanks at that time.

JCL-2SS · 10-14-2010, 10:38 AM

so i always thought my car was an under-performer, read this thread and pulled the fuse at 1pm put them back in at 7pm, What a difference, before i had trouble breaking the tires in any transmission mode. Now i break the tires in any mode including TC on. My only question which i cant seem to find the answer to in this thread, why does the fuse have to be pulled for a certain amount of time. i would think pulling it out and putting it right back in would do the same thing, unless there is some kind of capasitor holding a charge and needs to drain first.
Great post , thanks to the OP!!

BowlingSS · 10-20-2010, 03:36 PM

I assume the 2010-11 have two fuel maps like the 4th gen. A high and low octane map. So is this pulling of the fuses just resetting the map back to the high map. I can do that with my EFILive once I get my car.

If you use low octane gas by mistake this will be reset back to the low map and you will need to pull the fuses again.

Bill

Topdown · 10-20-2010, 04:48 PM

Quote:

Originally Posted by BowlingSS

I assume the 2010-11 have two fuel maps like the 4th gen. A high and low octane map. So is this pulling of the fuses just resetting the map back to the high map. I can do that with my EFILive once I get my car.

If you use low octane gas by mistake this will be reset back to the low map and you will need to pull the fuses again.

Bill

if your car perceives that it has low-octane fuel in it, it will switch to the low-map.

I have always put in 92 octane in my Camaro and about once a month or so do a fuse pull and so far have noticed a change a couple of times.

I am sure its a self-defense mechanism for GM, but if they could make these cars slightly less sensitive to the fuel octane level, it would make things easier.

but, as soon as I can afford it, I will be getting an engine and a trans tune... bye bye AFM, bye bye low-map, bye bye slow shifts...

BowlingSS · 10-21-2010, 09:51 AM

Quote:

Originally Posted by Topdown

if your car perceives that it has low-octane fuel in it, it will switch to the low-map.

I have always put in 92 octane in my Camaro and about once a month or so do a fuse pull and so far have noticed a change a couple of times.

I am sure its a self-defense mechanism for GM, but if they could make these cars slightly less sensitive to the fuel octane level, it would make things easier.

but, as soon as I can afford it, I will be getting an engine and a trans tune... bye bye AFM, bye bye low-map, bye bye slow shifts...

You just need to copy the high map to the low map, so if it switches the map will be the same.

Bill

Topdown · 10-21-2010, 12:19 PM

Quote:

Originally Posted by BowlingSS

You just need to copy the high map to the low map, so if it switches the map will be the same.

Bill

Exactly... bye bye low-map

SuperH · 10-26-2010, 10:50 AM

Wow...

Conversation with my dealer, who gave me two fillups, since no one was there to run through "Delivery" with me.

At "Delivery":
Me: "So, on the first fuel up, did you use regular or premium?"
Dealer: "We used regular. We've noticed that on a stock configuration, there has been no noticable difference between regular and premium fuel for the LS3s."
Me: "Ah, ok."
Dealer: "If you would like, when we will it up again we can put in premium, and you'll see there is no difference."
Me: "Sounds great! Thanks, and I'll report back!"

*Moving forward a bit*...

I noticed some bucking in second gear. It didn't seem like the timing was being advanced enough, even though I continued to run premium. What I ended up noticing was that premium was running worse.

So, I first saw this thread last night... I pulled the fuses, let it sit overnight. Then, I left for work this morning, and...

No bucking, or bogging on takeoff! Much better throttle response! It seems like a different car. Just... wow!

MG · 10-26-2010, 06:05 PM

So, does anyone know for sure if the fuse pull procedure for the 2011 is the same as that for the 2010?

I already did it on my 2011 L99. I didnt notice a difference but didnt expect to since my car was filled with 93 octane from the start. My MPG's are absolutely abysmal though no matter what I do, so I think I will give the fuse pull another shot. I just want to know if it is in fact the same #5 and #20 fuses that have to be pulled.

MG · 10-27-2010, 08:33 AM

audiofile · 10-27-2010, 09:19 AM

Yes, same for 2011 L99.

Blown355 · 10-28-2010, 09:12 AM

Someone please try this. If you think your having this issue, get a scan tool, check your timing at the upper rpm's. If it is around 10, pull these fuses. Let your car set for a few hours then get another recording. See if timing has improved I purchased the Actron for $99. My timing at the upper rpm's was ~20. Seat of the pant results are notoriously inaccurate.

GATORSS · 10-31-2010, 07:06 PM

Mibadd, did mine last night and I really think it doesn't matter which one you reinstall first. Didn't really notice any power improvements in spite of the dealer putting 87 in it last week when I bought it.

Gizz69 · 11-07-2010, 02:26 AM

I did this fuse pull on Monday night, and left them out for about 10 hours. I put them back in on Tuesday, and took it out for a good 45 min ride through multiple speeds and conditions. I can say that the car is a LOT stronger after doing this. I have driven it several times since then and it is like it is a completely different animal. Amazing difference!

3min3m2 · 11-07-2010, 09:43 AM

Quote:

Originally Posted by Blown355

Someone please try this. If you think your having this issue, get a scan tool, check your timing at the upper rpm's. If it is around 10, pull these fuses. Let your car set for a few hours then get another recording. See if timing has improved I purchased the Actron for $99. My timing at the upper rpm's was ~20. Seat of the pant results are notoriously inaccurate.

I have a scangauge, so I might actually check this soon. Although I don't have any problems right now.

10-14-2010, 10:38 AM	#1150
JCL-2SS Drives: 2010 2SS Imperial Blue Join Date: Mar 2010 Location: Lindenhurst, NY Posts: 216	so i always thought my car was an under-performer, read this thread and pulled the fuse at 1pm put them back in at 7pm, What a difference, before i had trouble breaking the tires in any transmission mode. Now i break the tires in any mode including TC on. My only question which i cant seem to find the answer to in this thread, why does the fuse have to be pulled for a certain amount of time. i would think pulling it out and putting it right back in would do the same thing, unless there is some kind of capasitor holding a charge and needs to drain first. Great post , thanks to the OP!! __________________ 2010 2SS IBM L99 6A, Janetty Tune, Dynatech headers and cats, Flowmaster exaust, SLP underdive pulley, CAI inc. CAI, MSD wires, LED's -taillights, side markers, knight rider, interior, Chevy emblem, rear plate

10-28-2010, 09:12 AM	#1159
Blown355 Drives: 2017 ZL1 A10 Join Date: Sep 2009 Location: Austin TX Posts: 866	Someone please try this. If you think your having this issue, get a scan tool, check your timing at the upper rpm's. If it is around 10, pull these fuses. Let your car set for a few hours then get another recording. See if timing has improved I purchased the Actron for $99. My timing at the upper rpm's was ~20. Seat of the pant results are notoriously inaccurate. __________________ 2017 ZL1 A10 Redhot with stripe

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10-20-2010, 03:36 PM	#1151
BowlingSS Camaro Owner Since 1987 Drives: 2011 2SS/RS L99 RJT Join Date: Jun 2006 Location: Lawrenceville, GA Posts: 2,185	I assume the 2010-11 have two fuel maps like the 4th gen. A high and low octane map. So is this pulling of the fuses just resetting the map back to the high map. I can do that with my EFILive once I get my car. If you use low octane gas by mistake this will be reset back to the low map and you will need to pull the fuses again. Bill

10-26-2010, 10:50 AM	#1155
SuperH Synergized Drives: 2011 SGM M6 2SS/RS Join Date: Oct 2010 Location: Irvine, CA Posts: 299 View My Garage	Wow... Conversation with my dealer, who gave me two fillups, since no one was there to run through "Delivery" with me. At "Delivery": Me: "So, on the first fuel up, did you use regular or premium?" Dealer: "We used regular. We've noticed that on a stock configuration, there has been no noticable difference between regular and premium fuel for the LS3s." Me: "Ah, ok." Dealer: "If you would like, when we will it up again we can put in premium, and you'll see there is no difference." Me: "Sounds great! Thanks, and I'll report back!" Moving forward a bit... I noticed some bucking in second gear. It didn't seem like the timing was being advanced enough, even though I continued to run premium. What I ended up noticing was that premium was running worse. So, I first saw this thread last night... I pulled the fuses, let it sit overnight. Then, I left for work this morning, and... No bucking, or bogging on takeoff! Much better throttle response! It seems like a different car. Just... wow!

10-26-2010, 06:05 PM	#1156
MG Drives: 2011 Camaro Join Date: Apr 2010 Location: NYC Posts: 627	So, does anyone know for sure if the fuse pull procedure for the 2011 is the same as that for the 2010? I already did it on my 2011 L99. I didnt notice a difference but didnt expect to since my car was filled with 93 octane from the start. My MPG's are absolutely abysmal though no matter what I do, so I think I will give the fuse pull another shot. I just want to know if it is in fact the same #5 and #20 fuses that have to be pulled.

10-27-2010, 08:33 AM	#1157
MG Drives: 2011 Camaro Join Date: Apr 2010 Location: NYC Posts: 627

10-27-2010, 09:19 AM	#1158
audiofile Drives: 2011 Red Jewel 2SS/RS Join Date: Aug 2010 Location: Macon, Ga Posts: 5	Yes, same for 2011 L99.

10-31-2010, 07:06 PM	#1160
GATORSS Drives: 2011 IBM 2SS/RS Join Date: Oct 2010 Location: OLIVE BRANCH, MS Posts: 12	Mibadd, did mine last night and I really think it doesn't matter which one you reinstall first. Didn't really notice any power improvements in spite of the dealer putting 87 in it last week when I bought it.

11-07-2010, 02:26 AM	#1161
Gizz69 Tony Drives: 2013 Camaro ZL1 Blk/Blk Join Date: Sep 2010 Location: Keller, TX Posts: 374 View My Garage	I did this fuse pull on Monday night, and left them out for about 10 hours. I put them back in on Tuesday, and took it out for a good 45 min ride through multiple speeds and conditions. I can say that the car is a LOT stronger after doing this. I have driven it several times since then and it is like it is a completely different animal. Amazing difference!