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

[GQ4Life]

Originally Posted by Roger Ramjet

There are, in fact, 2 spark tables for the L99 - High Octane and Low Octane.

so then the L99 was design to take 87oct but have better performance if u use 93oct
I wonder how long it takes it to recheck to see if it can bump back up to high octane map

[tightchevelle69]

dont know what our dealer put in our L99 before we bought it, but we have used 93 or 91 (whichever is available when time to fill up) since we brought it home. the car is definitely fast (comparing to my truck and the envoy we traded) but it doesnt spin tires with traction control on. it barely wants to do it with traction control off! it was built in november and was at dealer last week, but still almost no spin without deliberately trying with traction off. even in rain with traction control off it still doesnt spin much. i would think with TC off and in the rain i would barely be able to control it! yall think i should try the fuse pull?

(sorry for the long post!)

[Roger Ramjet]

The ECM logic to go from one spark table to the other is not visible with HPT but you can make both tables read the same.

[SonnyakaPig]

Originally Posted by GQ4Life

Ok cool got mine 12/06/2009 so I guess Im good..
mine will spin tires and do 90 degree turn with full traction control and stability on.. which really it shouldnt
I know people with like 350z's that wont spin in the snow let alone dry with traction control on..

i always have the Grey.. I wish it was faster

The saga continues...

So I pick up my car from the dealer and of course they scratch the inside of the driver's side door. I try so hard not to scratch it but apparently they are not as carefuly. However, scratches I can live with.

My car is now noticably slower. It has a tremendous lag when you step on it and the engine screams but the car just doesn't want to go. (This is how my 1996 Impala SS felt with headers, exhaust, intake, TB, and chip installed). Yes, it will still spin the rear tires from a dead stop with the traction control on but the lag is killing me.

The service guy I was dealing with told me on the phone that there was a problem with the L99's, that it was fixed and my car was built (1/10') after the fix.

I know they reset my computer or battery or something because my radio lost it's saved "tone" adjustments. No biggy there.

Simply put, I just don't recognize the feel of my car right now.

This is what the dealership wrote on my service invoice:

CUST FEELS FUEL ECONOMY ISN'T WHAT IT SHOULD BE. IDLE APPEARS ROUGH AT START UP AND WHILE DRIVING (i didn't say that last part to them). CUST INFORMED ELSEWHERE (C5) POSSIBLE COMPUTER UPDATE ?
INSPECT-NO SES-CHECK FOR BULLETINS-NONE IN ANY SYSTEM-CHECK FOR PROGRAMMING UPDATES-VEHICLE IS CURRENT-TEST DRIVE-NO DRIVEABILITY CONCERNS NOTED-
NO REPAIR MADE-VEHICLE IS CURRENTLY WORKING CORRECTLY

Maybe I just need to drive it for a couple of hours and it will return to normal.

I plan on getting it dynoed tomorrow so I will see what the HP/TQ #'s are.

[PQ]

Originally Posted by GQ4Life

doubt there is two tables but more of the car will automatically pull certain amount of timing when it senses the wrong fuel. pulling enough timing will make a car run a lil more rich.. it goes into a safe mod when it senses too much knock

Can't be true. My car had no less than 20 full tanks of 93 octane ran through it until I pulled the fuses. There was no reason for it to pull timing. It was the GM engineers that told us this info when they brought a Camaro down from MI and tested one of our cars here in Alabama. I figured the fuse pull thing out about 2 weeks after they came down and tested Scotts car and fixed it. They ran his car 0-60mph and deduced that it was true. The LT Camaro was running as fast as ours. After I pulled the fuses, I gained a full second and a half in the quarter mile and a full second 0-60mph. There was no reason for my car to pull timing constantly unless there was another table.

Originally Posted by Contemporary485

DO YOU PULL THE FUSES WHEN THE CAR IS RUNNING? OFF? kEY IN? OUT?

wHAT'S THE PROCEDURE? pARK IT, TAKE THE KEY OUT, THEN PULL? tHEM REPLACE HOURS LATER BWFORE TURNING THE CAR ON I SUPPOSE?

Please don't pull your computer fuses while the car is running. Your car needs the computer to run.

Originally Posted by GQ4Life

Ok cool got mine 12/06/2009 so I guess Im good..
mine will spin tires and do 90 degree turn with full traction control and stability on.. which really it shouldnt
I know people with like 350z's that wont spin in the snow let alone dry with traction control on..

i always have the Grey.. I wish it was faster

Originally Posted by Roger Ramjet

There are, in fact, 2 spark tables for the L99 - High Octane and Low Octane.

Thank you.

Originally Posted by GQ4Life

so then the L99 was design to take 87oct but have better performance if u use 93oct

No. It was designed to take High octane but will run on low.

Originally Posted by tightchevelle69

dont know what our dealer put in our L99 before we bought it, but we have used 93 or 91 (whichever is available when time to fill up) since we brought it home. the car is definitely fast (comparing to my truck and the envoy we traded) but it doesnt spin tires with traction control on. it barely wants to do it with traction control off! it was built in november and was at dealer last week, but still almost no spin without deliberately trying with traction off. even in rain with traction control off it still doesnt spin much. i would think with TC off and in the rain i would barely be able to control it! yall think i should try the fuse pull?

(sorry for the long post!)

Well, these are sticky tires so without doing a brake stand you aren't gonna roast them all the way down the road, but if you can barely spin them in the rain, you got more trouble than this thread can help with. Even before the fuse pull I could spin the tires to 30 mph.

Originally Posted by Roger Ramjet

The ECM logic to go from one spark table to the other is not visible with HPT but you can make both tables read the same.

Please explain. What do you mean make both read the same?

Originally Posted by SonnyakaPig

The verdict's in! My car does not have the SLOWS! I'm very happy. The dealer checked the computer and my car was built with the updated program.

I pretty much figured that when I read people talking about their cars spinning the wheels with traction control on from a dead stop after the 5-20 fix. Mine did that from the factory. So I guess all is good for the L99.

Oh, and the dark grey color feels like the fastest.

Originally Posted by SonnyakaPig

The saga continues...

So I pick up my car from the dealer and of course they scratch the inside of the driver's side door. I try so hard not to scratch it but apparently they are not as carefuly. However, scratches I can live with.

My car is now noticably slower. It has a tremendous lag when you step on it and the engine screams but the car just doesn't want to go. (This is how my 1996 Impala SS felt with headers, exhaust, intake, TB, and chip installed). Yes, it will still spin the rear tires from a dead stop with the traction control on but the lag is killing me.

The service guy I was dealing with told me on the phone that there was a problem with the L99's, that it was fixed and my car was built (1/10') after the fix.

I know they reset my computer or battery or something because my radio lost it's saved "tone" adjustments. No biggy there.

Simply put, I just don't recognize the feel of my car right now.

This is what the dealership wrote on my service invoice:

CUST FEELS FUEL ECONOMY ISN'T WHAT IT SHOULD BE. IDLE APPEARS ROUGH AT START UP AND WHILE DRIVING (i didn't say that last part to them). CUST INFORMED ELSEWHERE (C5) POSSIBLE COMPUTER UPDATE ?
INSPECT-NO SES-CHECK FOR BULLETINS-NONE IN ANY SYSTEM-CHECK FOR PROGRAMMING UPDATES-VEHICLE IS CURRENT-TEST DRIVE-NO DRIVEABILITY CONCERNS NOTED-
NO REPAIR MADE-VEHICLE IS CURRENTLY WORKING CORRECTLY

Maybe I just need to drive it for a couple of hours and it will return to normal.

I plan on getting it dynoed tomorrow so I will see what the HP/TQ #'s are.

Holy crap. Ya, one of the things I got the most frustrated with during those 3 months was that the service department would drive it and say that it's a freakin' beast. Nothing wrong with this car. And after going to them about 5 times, one of them said "Sir, if you wanted a Corvette, you should have bought one"

I felt so good when they were all proven wrong. The clock doesn't lie.

[spooky0]

Originally Posted by PQ

The car is supposed to have been updated to restore automatically. I can't seem to get a confirmation on this. The newer ones should have been corrected at the factory and the early ones should have been flashed with the update at the dealer on service.

Surely the engineers that came down and discovered this on Scotts car did the necessary updates. I'm gonna try to get confirmation.

spooky0, let us know if you see a change.

I'll let you guys know if I feel any change as soon as I do it.

[PQ]

Originally Posted by spooky0

I'll let you guys know if I feel any change as soon as I do it.

But the 'Butt Dyno' doesn't allways catch it. The clock will.

[SonnyakaPig]

Originally Posted by PQ

Holy crap. Ya, one of the things I got the most frustrated with during those 3 months was that the service department would drive it and say that it's a freakin' beast. Nothing wrong with this car. And after going to them about 5 times, one of them said "Sir, if you wanted a Corvette, you should have bought one"

I felt so good when they were all proven wrong. The clock doesn't lie.

haha! thanks for the response. It's cool how supportive you are.

Yeah, I hear you. That would have made me real mad too. If you're into nice cars you can tell the difference between individual models and if you want your Camaro to run how it's supposed to run, we shouldn't be blamed for that.

I have some good news. I hope it stays this way. My car seems to be running much better tonight. I drove it a little more. Smashed on it a little and bam, seems like she remembers who she's performing for.

These computers want to run the show. I finally understand how valuable a good tuner can be. A good tuner is like master of his Camaro universe. G-d bless.

Looking forward to my planned dyno tomorrow. I'm hoping for solid HP/TQ #'s.

[PQ]

Originally Posted by SonnyakaPig

Looking forward to my planned dyno tomorrow. I'm hoping for solid HP/TQ #'s.

[GQ4Life]

like I said my car needs to be floor a couple of times to get to its full potential
with spinning if I floor it it doesn't blow tires off it just spins a lil unless I really make it spin alot.. car has a lot of grip
I have LS3

[Scott@Bjorn3D]

Originally Posted by GQ4Life

doubt there is two tables but more of the car will automatically pull certain amount of timing when it senses the wrong fuel. pulling enough timing will make a car run a lil more rich.. it goes into a safe mod when it senses too much knock

There are two table, low octane and high octane. GM Engineers showed me allot of stuff and I learned alot about the car and computer from spending a day with them.

Also I am one of the very few people that got to drive the CTF car that was submitted to magazines and online press for testing. My car ended up when done 2 10ths of a second quicker to 60 than there car in the end. It was 95 and humid.

CTF car 0-60 5.3
Bee Bee 0-60 5.1

[GQ4Life]

Originally Posted by Scott@Bjorn3D

There are two table, low octane and high octane. GM Engineers showed me allot of stuff and I learned alot about the car and computer from spending a day with them.

Also I am one of the very few people that got to drive the CTF car that was submitted to magazines and online press for testing. My car ended up when done 2 10ths of a second quicker to 60 than there car in the end. It was 95 and humid.

CTF car 0-60 5.3
Bee Bee 0-60 5.1

thats weird.. GM didnt bring a ringer for testing..
I dont know where article is but they found out nissan brought a ringer for nurinberg test. The US GT-R that they tested wasnt fast enough or handle as good..

[PQ]

Originally Posted by GQ4Life

thats weird.. GM didnt bring a ringer for testing..
I dont know where article is but they found out nissan brought a ringer for nurinberg test. The US GT-R that they tested wasnt fast enough or handle as good..

lmao. I'm sure your just joking but no 'Ringer' needed to go to Alabama and test one guys car. And anyway, Scott beat him.


But that's what I've been trying to say. If a GM engineer said it has 2 fuel tables, he's either lying or ......... it has 2 fuel tables.

[GQ4Life]

Originally Posted by PQ

lmao. I'm sure your just joking but no 'Ringer' needed to go to Alabama and test one guys car. And anyway, Scott beat him.


But that's what I've been trying to say. If a GM engineer said it has 2 fuel tables, he's either lying or ......... it has 2 fuel tables.

I can believe it has two fuel tables.. not hard to do Im sure.. picks up knock and jump to low octane map..
probably safer then most cars..
my last car just retarded timing when it sense knock to get rid of it.. but the engine had to knock for it to keep pulling the timing..
u put low octane in and the car wouldnt even run