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

[VQ35DE]

Originally Posted by PQ

Apparently it was in fact my dealer that fixed it and not me...........

/thread

Thanks for doing this.

[HER45th2SS]

Originally Posted by PQ

Apparently it was in fact my dealer that fixed it and not me...........

/thread

We now need to learn what the dealer did to fix the problem.

[Gillespiers]

After the fuse pull. The car seems more responsive. MPG appears to have gone up. shifts a bit smoother. Seemed to wake it up!

Great Thread !

[PQ]

Originally Posted by HER45th2SS

We now need to learn what the dealer did to fix the problem.

Well, they told me they 'Reflashed' it. Previously they wouldn't do it. I grew to despise the term. I guess I was wrong. Would essentially do the same thing I guess.

Unless I can get any reason to believe that the fuses can accomplish an ECM reset when they have no power to them I have to believe it has to be the fuse in the trunk.

[techinny]

Soooooo, according to PQ's video, pulling the 5&20 fuses is just a psycological thing? I will admit I believe it.


With that said, the technician in me wonders if there is still millivolts (that would not be read on PQ's voltmeter setting) that is keeping the "memory" in the ECM.

[PQ]

Originally Posted by techinny

Soooooo, according to PQ's video, pulling the 5&20 fuses is just a psycological thing? I will admit I believe it.


With that said, the technician in me wonders if there is still millivolts (that would not be read on PQ's voltmeter setting) that is keeping the "memory" in the ECM.

I doubt it. The Ohms, or whatever it would be, that it recorded when I touched the lead with my fingers showed that it would read pretty small. Mine was set to read an accurate 12V on the decimal level.

We HAVE however figured out why the battery disconnect never helped. The battery backup is between the battery and the #13 fuse in the trunk and makes perfect sense.

From here on out (again, unless it can be shown that my test last night is not conclusive) I will only accept timed testing as confirmation.

What a perfect storm of crap.

My tests (dyno, accelerometer, video) is conclusive evidence of the gains, it just wasn't the fuse pull that did it.

I'm getting drunk tonight.

However, those guys who just disconnected their ECMs all together must have been happy.

[rico-2SS]

Originally Posted by PQ

I'm getting drunk tonight.

about 5 just before tigers start game one

[techinny]

Originally Posted by PQ

I doubt it. The Ohms, or whatever it would be, that it recorded when I touched the lead with my fingers showed that it would read pretty small. Mine was set to read an accurate 12V on the decimal level.

We HAVE however figured out why the battery disconnect never helped. The battery backup is between the battery and the #13 fuse in the trunk and makes perfect sense.

From here on out (again, unless it can be shown that my test last night is not conclusive) I will only accept timed testing as confirmation.

What a perfect storm of crap.

My tests (dyno, accelerometer, video) is conclusive evidence of the gains, it just wasn't the fuse pull that did it.

I'm getting drunk tonight.

However, those guys who just disconnected their ECMs all together must have been happy.

Your meter was reading anything above one one hundredths of a volt or .01 volts, I am talking milli volts, (there are 1000 milli volts in a volt). Your meter would have to be set on mv, not v.

I am in no way trying to argue with you PQ, just trying (out loud) figure why so many of us swear pulling 5&20 makes any difference.

[PQ]

Originally Posted by techinny

Your meter was reading anything above one one hundredths of a volt or .01 volts, I am talking milli volts, (there are 1000 milli volts in a volt). Your meter would have to be set on mv, not v.

I am in no way trying to argue with you PQ, just trying (out loud) figure why so many of us swear pulling 5&20 makes any difference.

Oh, heck ya. I'm with you. I was just wondering that it would have to be so small that it would register less than the natural ohms my fingers create.

But I don't know if that small of a current could ever make a difference. If so then according to the resistance my fingers made you wouldn't have to pull the fuses, just touch them.

[techinny]

Just went out and checked the fuses, key off, meter set on millivolts.........absolute zero!!!! So when do we start drinking PQ?

[The Stig]

Originally Posted by techinny

Just went out and checked the fuses, key off, meter set on millivolts.........absolute zero!!!! So when do we start drinking PQ?

this just got interesting....

[techinny]

OK, I am going crazy here, I am used to access to full wiring schematics, explination of how things work, and a contact to the factory and engineers of the manufacturer of the equipment I work on so I can figure out (or come up with my own theory) why something does what it is doing. Unfortunately Chevrolet is NOT IT!!!! FIRST YOU TOLD ME THERE WAS A SANTA CLAUS, NOW YOU SAY IT'S NOT TRUE!?!?!?!?!?!?!?!?!?!?

[90503]

Originally Posted by techinny

OK, I am going crazy here, I am used to access to full wiring schematics, explination of how things work, and a contact to the factory and engineers of the manufacturer of the equipment I work on so I can figure out (or come up with my own theory) why something does what it is doing. Unfortunately Chevrolet is NOT IT!!!! FIRST YOU TOLD ME THERE WAS A SANTA CLAUS, NOW YOU SAY IT'S NOT TRUE!?!?!?!?!?!?!?!?!?!?

Not sure if you are saying the fuse pull does or doesn't work, but earlier in the thread there was a tsb showing that it indeed was the way to reset the octane table...(as well as making sure it was running on premium)...

Just sayin' it must have jived with some electrical schematic at some point...lol

[techinny]

Originally Posted by 90503

Not sure if you are saying the fuse pull does or doesn't work, but earlier in the thread there was a tsb showing that it indeed was the way to reset the octane table...(as well as making sure it was running on premium)...

Just sayin' it must have jived with some electrical schematic at some point...lol

Go back to PQ's video and read on. According to PQ's test and I confirmed it, with the key off, the fuses have no power, we are trying to figure out how the fuse pull works if there is no power to the fuses.

I think just about all of us agree, (or are dilusional) that the fuse pull does work and makes a difference. A couple of us just can't be comfortable with that and leave well enough alone.