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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 12-16-2013, 10:14 AM   #2551
wakespeak
 
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Just reporting back....

After 16K miles my conclusion is that, for the '13 MY at least, the ECU constantly goes back and forth between premium and regular fuel maps. My view on the cause is crankcase gases routed back into the intake by the PCV system. The gases can cause pinging regardless of the fuel octane.

After installing a catch can the car is maintaining the noticeably more peppy premium map for me. No audible pinging. Idle has improved as well, engine smoother.
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Old 12-23-2013, 12:59 PM   #2552
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I tried this on my 1LE that I imported into New Zealand. I was unsure what fuel was in the tank so I drove the tank dry and filled with 98 Octane. This fuel is readily available over here and is only a few cents more. After the fuse pull I took the car for a ride, after it warmed up I launched a few times and to my surprise I could feel it pull harder. I wondered if it was just a placebo effect but suddenly on one of my launches the car fish tailed and traction control kicked in...... The fuel pull works, not sure about long term but for the moment running 98 octane it's a different car
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Old 12-29-2013, 04:52 PM   #2553
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Pulled all 3 (trunk also) fuses today.
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Old 01-01-2014, 03:33 PM   #2554
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I'm sure the dealership put it 87 oct when i bought my 2010 camaro ss.. simply because they didn't know or didn't want to pay the pennies more for it.. either way the guy who sold me the car is a dumbass.. how can we check to see if this worked.. it doesn't feel any different.. i mean it kinda does but I'm not sure if its just in my head.. can the dealership hook it up and check or is this something i need to take to a preformance shot that does tuning to check? new to camaros and i just wanna make sure my baby is running healthy. also the person who owned the car before me I'm sure also put 87 oct in it... just an assumption by the way the car was when i got it.. spent a lot of man hours cleaning and getting her in perfect order. thanks in advance
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Old 01-03-2014, 09:50 AM   #2555
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I would like to confirm this works on my 2014 LS3 as well. The dealership told me they only use 87 except in their Corvettes and ZL1, etc. so after speaking to a fellow member of WW5GCC, I decided to try the fuse pull. I did not pull any battery or constant power connections.

Afterward I noticed that 1st gear was MUCH smoother both during acceleration and deceleration and even between shifting from 1st to 2nd (TR6060).

I also can report after a couple days of Puget Sound traffic I have even increased my (overall) fuel mileage so far by 0.2 MPG. I bought the car Dec 12, 2013 and haven't done any mileage calculation resets or anything at all.

Even if this is a myth, hell I'd be happy if it's my subconscious just working better haha but I seriously can tell there's a difference. Can't comment about power, as that wasn't really much of what I was after but instead because I only use Premium Octane fuel I want the mappings correct.
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Old 02-17-2014, 12:36 AM   #2556
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I pulled the fuses let em sit for like a day and a half and the put em back in immediately started it up. Rough start, and drove away, the shifts were stalling at like 5k rpms when I stepped on it and locked up. I will report back after it sits for awhile with the fuses in it.
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Old 02-17-2014, 04:24 AM   #2557
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Quote:
Originally Posted by Rjizzle10 View Post
I pulled the fuses let em sit for like a day and a half and the put em back in immediately started it up. Rough start, and drove away, the shifts were stalling at like 5k rpms when I stepped on it and locked up. I will report back after it sits for awhile with the fuses in it.
On a L99, I always pulled the fuses over night. Put them in the next morning, start car let it idle for 5 minutes to figure out air fuel trims for the current temps of the outside air then off I would go.

My LS3 I do the exact same way and works great. I did do it once on my L99 with just putting fuses in starting up and taking off, car acted sick for about 40 miles. A GM guy told me the car has to learn air breathing again if you pull the fuses and I did not let it sit and do that and it had to learn it with different air flow speeds over the MAF since I was driving it.
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Old 02-17-2014, 04:18 PM   #2558
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It seems like it's acting better now but I don't think any difference in performance
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Old 02-19-2014, 07:27 AM   #2559
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I am 100% convinced that the reason my car has been reverting back to the lower octane table was that I was putting only 2-3 gallons of premium in my car by using the same hose that dispenses lower octanes. I don't put a ton of miles on my car.
Ever since I started filling up each time, my car has been performing properly.

It was making me crazy that my 400 hp car wasn't always the same rocket that my '97 Z28 was.
My car has been great for over 3 months now. No comparison. Just awesome.
So many Camaro SS sitting on used car lots.

I just finished buying a used CR-V for work, so I've been on cars.com a ton lately.
I wonder if Chevrolet is aware of what a potential problem this has been for the future of these cars.
There are about 4,000 used 2010 and 2011 Camaros listed.
What is staggering is when you review a few free car fax reports and note the time periods that many people are bailing on the car.
Two months, eight months. A very bad pattern emerges.
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Old 02-21-2014, 12:19 PM   #2560
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Another update:

I posted a while back that filling up an empty tank was considered a "significant fueling event" and that would reset the ECU maps. I found it on another Chevy site.

Recently I got what must have been some bad fuel. The car clearly moved to the regular map (I heard some pinging prior). It remained there for the duration of the tank. I waited till empty, filled up with premium, and boom, back in premium map with no fuse pull. I think this is true for the '12-'13 cars.
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Old 03-05-2014, 04:07 PM   #2561
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Read out my ECU on 2014 2SS and found already 70 misfires on cylinder 1 and the others between 2 and 10 another one had 48 in the memory. (might be wrong values because otherwise I would have a prob) Itīs my second tank of 91+ Gas with 60% level, find nothing in the ECU what tells me the octane settings (just started with this ODB2) maybe I need a pro tool.

Will drive a little and log the data and compare how often that happens.

Can that be a sign for the wrong fuel Map/Table?

I will try this fuse pull, it doesn't hurt. Letīs see
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Old 03-08-2014, 10:14 AM   #2562
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There is way too much opinion and speculation on this thread.

When you pull the fuse or reset the obd2 system, the car resets the short term and long term fuel trim values. For this reason, it will run differently while it re-learns. It may appear to run super or poorly, but over time will adjust to ideal air/fuel combustion and fuel economy.

So even if the dealer put in 87, it will adjust to 94 over time.
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Old 03-08-2014, 11:52 AM   #2563
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Quote:
Originally Posted by maddoggyusa View Post
There is way too much opinion and speculation on this thread.

When you pull the fuse or reset the obd2 system, the car resets the short term and long term fuel trim values. For this reason, it will run differently while it re-learns. It may appear to run super or poorly, but over time will adjust to ideal air/fuel combustion and fuel economy.

So even if the dealer put in 87, it will adjust to 94 over time.
What your missing is the Camaros flaw is it does not slowly adjust to the 94 octane. Once in the low octane fuel table due to the use of 87 it's stuck until the fuse is pulled to reset the computer
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Old 03-08-2014, 06:23 PM   #2564
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OK, I did not realize there are different fuel tables. I incorrectly assumed there was only 1 table.
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Old 03-09-2014, 07:09 PM   #2565
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So after Fuse Pull 24hrs ago on my 2014 SS, filled it up with 93Oct, had a quarter tank of 91Oct left in it. I can agree to what the most say, much better in first gear, better idle, and much more smooth during acceleration. I think it sounded a little more dirty before but still get my plops and rattles The Engine is not so shaky anymore, I still think you can feel when its running in the wrong fuel map, now its like it should be with an new car not so rough.

Gears going better in too, don't know why that is but it should has a reason.

Works the Same like on 2013 or lower years.

Next will be the Fuse Pull for the Exhaust just to try

Just do it and drive it, like the most say, feels like a newer car.
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Old 03-09-2014, 07:17 PM   #2566
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So after Fuse Pull 24hrs ago

NEXT WILL BE THE FUSE PULL or the Exhaust just to try
Didn't you just do the fuse pull?
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Old 03-09-2014, 07:49 PM   #2567
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I did this yesterday because I suspected the dealer put 87 octane in the tank before I took delivery.

I pulled fuses 5 & 20, cooked and ate dinner, then reinstalled the fuses. I let it idle for 5 - 10 minutes before driving the car.

I was surprised by the marked improvement in usable power, which was especially noticeable during low RPM acceleration.

Kelly at PCMofNC recommended I do this before bringing the car in for a tune, as a precaution. Her exact words were "87 octane really neuters the car".

Based on my experience, I agree with her completely.
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Old 03-09-2014, 07:53 PM   #2568
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Didn't you just do the fuse pull?

for the NPP, did the one for the fuel map.

forgot an "f" in the other post....
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Old 03-09-2014, 07:58 PM   #2569
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for the NPP, did the one for the fuel map.

forgot an "f" in the other post....
Gotcha!
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Old 03-09-2014, 07:59 PM   #2570
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I've heard a lot about the fuse pull, is it still worth while if you've had a trifecta tune done? I bought my car used and don't trust that it was always fed the proper fuel.

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Old 03-10-2014, 08:02 PM   #2571
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I'd say it works I was running 12.90s all night, waiting in staging line for my last run and pulled the fuses, ended up running a 12.70 I'd say it defenently works
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Old 03-12-2014, 09:57 PM   #2572
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Doesn't really make much sense that it would do anything after a tune, but hellv I'll give it a shot lol

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Old 03-14-2014, 09:36 AM   #2573
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I've had my 2013 2SS in storage all winter with the battery disconnected, can I assume that I would not have do the fuse pull?

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Old 03-17-2014, 07:32 PM   #2574
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Quote:
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OK, I did not realize there are different fuel tables. I incorrectly assumed there was only 1 table.
Well... like you said earlier:

Quote:
Originally Posted by maddoggyusa View Post
There is way too much opinion and speculation on this thread.
Too much assumption as well.
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Old Yesterday, 11:12 AM   #2575
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Is this the same for the 2014's? I have a 2014 ZL1 and am getting ready to install a roto fab and vmax throttle body. I'm assuming the fuses are the same?
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