2014 SS fuel fuse pull? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Scott@Bjorn3D · 01-15-2014, 05:24 AM

PQ our cars had the trunk fuse also. The back fuse has to do with the battery backup.

5 and 20 work on my 2013.

camguynj · 01-15-2014, 06:35 AM

Quote:

Originally Posted by Scott@Bjorn3D

PQ our cars had the trunk fuse also. The back fuse has to do with the battery backup.

5 and 20 work on my 2013.

+1 What he said

not · 01-15-2014, 06:39 AM

urban myth status now............check the oil in your catch can for a clear answer, ha...

PalmerGA · 01-15-2014, 07:18 AM

Quote:

Originally Posted by camguynj

+1 What he said

+2 What Cam and Scott said. I have done two fuse pulls in the past year - both due to dealer filling my tank with 87 octane.

First pull was 5 & 20. Second pull was 5 & 20 & 10. I noticed the improvement after BOTH pulls, but no difference between the pulling #10 or not. I think 5 & 20 does the trick.

And remember, OP - be sure ALL the 87 octane has been run out and the tank has ONLY 91+ octane in it BEFORE you do the pull.

QUICKSS · 01-15-2014, 10:01 AM

My car was pulling -6 degrees timing after the fuse pull. Gotta say the fuse pull doesn't work. At least on my 2013 LS3.

wakespeak · 01-15-2014, 10:05 AM

If you use premium consistently and still the car slips into the 87 octane map, consider a catch can. This was my experience. I began to think something else besides bad gas was affecting my car since I also often had pinging on hard acceleration no matter where I filled up. I finally installed a catch can thinking the PCV oil mist is ruining the octane. No pinging since and it is staying in the premium map as far as I can tell.

camguynj · 01-15-2014, 10:56 AM

Quote:

Originally Posted by QUICKSS

My car was pulling -6 degrees timing after the fuse pull. Gotta say the fuse pull doesn't work. At least on my 2013 LS3.

So what did you do?

PQ · 01-15-2014, 11:24 AM

I'm not an electrical circuit expert so I can not explain why this should work but I have seen compelling evidence why it shouldn't.

What I DO know is my car was a full second faster and most of that second took place in initial acceleration to 60 mph.

Basically if you measure the power in those fuses with the ignition off there is not power. I made a video where I did that.

I can't explain it.

tekteq · 01-15-2014, 08:29 PM

fuses pulled, putting them back tomorrow morning and reporting back

camguynj · 01-15-2014, 08:37 PM

Quote:

Originally Posted by tekteq

fuses pulled, putting them back tomorrow morning and reporting back

Rocky1974 · 01-16-2014, 08:33 AM

Quote:

Originally Posted by tekteq

My 2014 SS L99 is at around 1500 miles now and I just read bout the fuse pull people used to do on their camaros because of the octane problem. I'm sure my dealer filled my car up with 87 when I bought it but I've been filling with 91 ever since. Does anybody know if GM has fixed the issue on the 2014 or should I do a fuse pull? Thanks!

It would be impossible for GM to fix an issue that they never had! The PCMs in these cars function exactly they way they were designed to and exactly the same way they always have. If you spend much time on these board, these guys will have you believing that this is something new with 5th gens. Nothing could be farther from the truth! We were doing this back in the mid-eighties on the TPIs and GNs.

As you drive the fuel and spark tables, in the PCM, are modified based in information from the various sensors. If you put 87 octane in, the PCM will pull timing and store that information in it's memory. The wives tale part is that it somehow gets stuck there and will never return to the 91-93 tables. This is not true! It just returns slowly, just like they always have. If you do the fuse pull, you wipe out every thing the PCM has "learned", resetting all parameters back to factory defaults. If your car has had 87 octane in it, the fuse pull will restore full power immediately. But if you just drive it, you will still get the power back, just more slowly, like its designed to.

PQ · 01-16-2014, 09:25 AM

Quote:

Originally Posted by Rocky1974

It would be impossible for GM to fix an issue that they never had! The PCMs in these cars function exactly they way they were designed to and exactly the same way they always have. If you spend much time on these board, these guys will have you believing that this is something new with 5th gens. Nothing could be farther from the truth! We were doing this back in the mid-eighties on the TPIs and GNs.

As you drive the fuel and spark tables, in the PCM, are modified based in information from the various sensors. If you put 87 octane in, the PCM will pull timing and store that information in it's memory. The wives tale part is that it somehow gets stuck there and will never return to the 91-93 tables. This is not true! It just returns slowly, just like they always have. If you do the fuse pull, you wipe out every thing the PCM has "learned", resetting all parameters back to factory defaults. If your car has had 87 octane in it, the fuse pull will restore full power immediately. But if you just drive it, you will still get the power back, just more slowly, like its designed to.

I wonder if there was some possible way for a car TO get stuck there OR that somehow there were some sensor readings that got stuck and needed a 'Reboot'. Because with mine, in the very beginning, was sluggish. I timed the car over a hundred times over the course of 2 and a half months and consistently got an average of 14 and a half seconds. When I pulled the fuses my very first run was half a second fastest run of all of the previous runs. Then from there timing it was at .900 seconds faster on average.

I cant' explain it. Shouldn't happen that way as I know exactly what you are saying is true. AND that there is no power in the two fuses I pulled when the ignition is off. (my dealer did have the car just before I pulled the fuses) But I put nothing but 93 octane fuel in my car for those nearly 3 months.

I do not know whether I'd have been back down to a slow spark timing slowly. I timed my car about 10 times that day and never did again. Right after that I did exhaust and headers and tuned me car.

tekteq · 01-16-2014, 11:38 PM

Put them back this morning. I feel more power...maybe? It might be mental or I'm just rushing the gas. Even if it is mental, it feels good to know I reset the computer to ensure its on the 91 timing

Quote:

Originally Posted by Rocky1974

It would be impossible for GM to fix an issue that they never had! The PCMs in these cars function exactly they way they were designed to and exactly the same way they always have. If you spend much time on these board, these guys will have you believing that this is something new with 5th gens. Nothing could be farther from the truth! We were doing this back in the mid-eighties on the TPIs and GNs.

As you drive the fuel and spark tables, in the PCM, are modified based in information from the various sensors. If you put 87 octane in, the PCM will pull timing and store that information in it's memory. The wives tale part is that it somehow gets stuck there and will never return to the 91-93 tables. This is not true! It just returns slowly, just like they always have. If you do the fuse pull, you wipe out every thing the PCM has "learned", resetting all parameters back to factory defaults. If your car has had 87 octane in it, the fuse pull will restore full power immediately. But if you just drive it, you will still get the power back, just more slowly, like its designed to.

Very very interesting! I guess TECHNICALLY speaking it does work!

TigerFA · 02-19-2014, 05:28 PM

The only thing I can say of all cars from 90´s and up they all have a learnable ECU that adjusts to the driver habits, and that goes slow, same like the break in procedure, the car learns how the driver does and try to compensate. I felt that with used cars like from old people they never saw really the throttle, even the engines are full of residue, they got driven a lot harder and more recent and see (maybe young driver) they go much better. I think that should be the same with the timing and fuel tables it just goes slow how its designed. I can´t think about that engineers in the 2000´s doesn´t know this or the car hangs itself up in the ECU program. Then the car is not finished or like "lemon law" you didn´t got what you paid for and they really can´t do this. They can´t expect if they sell you a car with 426hp, not to expect the customer goes on a dyno and test what he got, so after transmission and axle etc. it should be over 400hp min. Otherwise you can bring your car back and tell them: give me what I paid for, it´s your right, so why in the hell they will put an ECU in there what gets stuck.

The only thing what you do with that fuse pull is resetting even your own information of driving what the car already learned, like acceleration, shifting, downshift etc. to adjust fuel management even mpg rates.

The car will learn your habits again after reset, maybe better maybe not.

01-15-2014, 11:24 AM	#22
PQ Booooosted. Drives: 2010 Supercharged SS Join Date: Apr 2008 Location: Mobile, AL Posts: 36,716 View My Garage	I'm not an electrical circuit expert so I can not explain why this should work but I have seen compelling evidence why it shouldn't. What I DO know is my car was a full second faster and most of that second took place in initial acceleration to 60 mph. Basically if you measure the power in those fuses with the ignition off there is not power. I made a video where I did that. I can't explain it. __________________

01-15-2014, 08:29 PM	#23
tekteq HT5 in the 626 Drives: 2014 Camaro 2SS/RS Join Date: Nov 2013 Location: 626, California Posts: 757	fuses pulled, putting them back tomorrow morning and reporting back __________________ 2014 L99 Camaro 2SS/RS ~ Flowmaster American Thunder Catback ~ Cold Air Inductions CAI ~ VMAX Ported TB ~ ARH Catted LTs ~ Tuned by Ted @ JRE A wise man once said, he who eats crackers in bed get crummy sleep.

01-15-2014, 05:24 AM	#15
Scott@Bjorn3D Drives: Kami, 2013 2SS LS3 Luvin Join Date: Oct 2008 Location: Eufaula, Alabama Posts: 6,427	PQ our cars had the trunk fuse also. The back fuse has to do with the battery backup. 5 and 20 work on my 2013.

01-15-2014, 06:39 AM	#17
not Account Suspended Drives: Camaro 2SS/RS Join Date: Sep 2013 Location: New Hampshire Posts: 341	urban myth status now............check the oil in your catch can for a clear answer, ha...

01-15-2014, 10:01 AM	#19
QUICKSS Drives: 2013 2SS Join Date: Mar 2013 Location: Garage Posts: 82	My car was pulling -6 degrees timing after the fuse pull. Gotta say the fuse pull doesn't work. At least on my 2013 LS3.

01-15-2014, 10:05 AM	#20
wakespeak Drives: 2020 ZL1 1LE Join Date: Sep 2012 Location: Austin, Texas Posts: 1,335	If you use premium consistently and still the car slips into the 87 octane map, consider a catch can. This was my experience. I began to think something else besides bad gas was affecting my car since I also often had pinging on hard acceleration no matter where I filled up. I finally installed a catch can thinking the PCV oil mist is ruining the octane. No pinging since and it is staying in the premium map as far as I can tell.

02-19-2014, 05:28 PM	#28
TigerFA Drives: Camaro 2SS 2017 Red Hot Join Date: Jan 2014 Location: PA, Philadelphia and Germany Posts: 232 View My Garage	The only thing I can say of all cars from 90´s and up they all have a learnable ECU that adjusts to the driver habits, and that goes slow, same like the break in procedure, the car learns how the driver does and try to compensate. I felt that with used cars like from old people they never saw really the throttle, even the engines are full of residue, they got driven a lot harder and more recent and see (maybe young driver) they go much better. I think that should be the same with the timing and fuel tables it just goes slow how its designed. I can´t think about that engineers in the 2000´s doesn´t know this or the car hangs itself up in the ECU program. Then the car is not finished or like "lemon law" you didn´t got what you paid for and they really can´t do this. They can´t expect if they sell you a car with 426hp, not to expect the customer goes on a dyno and test what he got, so after transmission and axle etc. it should be over 400hp min. Otherwise you can bring your car back and tell them: give me what I paid for, it´s your right, so why in the hell they will put an ECU in there what gets stuck. The only thing what you do with that fuse pull is resetting even your own information of driving what the car already learned, like acceleration, shifting, downshift etc. to adjust fuel management even mpg rates. The car will learn your habits again after reset, maybe better maybe not.