Fuse pull highly recommended

[The Stig]

Originally Posted by firecross91

Disconnected the batt. tonight. Will see tomorrow what happens. Looking at the dyno sheet from the other weekend I don't see any hp drop thru the run from 2350rpm to 5950. That is where to rev limiter hit. Does have a torque blip at 2700 rpm. No drop just no increase for a couple hundred rpm then steady climb again to max at 4000 rpm.

Disconnecting the battery doesn't work. You have to remove fuses #5 and #20

[firecross91]

Originally Posted by stieger

Disconnecting the battery doesn't work. You have to remove fuses #5 and #20

Oh OK did that. No change with batt disconnect as stated above.

[PQ]

Originally Posted by OldJedi

Just out of curiosity, when you pull the fuses (5 & 20) and let it sit overnight, how will the system "reset" itself overnight by itself without any power? Just not sure how this whole idea works with the engine off and no power going through the fuse panel. Thanks.

It's similar to rebooting a computer or device that is messign up. It boots back up with the factory defaults or defaults that have been intentionaly changed.

Originally Posted by AKA

I have been reading about this fuse pull since I bought my Camaro last summer. I never did it thinking there was no evidence to back it up and people are just feeling what they think is a power increase because they read about it on a blog. The everything I read about on the internet is true theory. I finally decided to try it after this thread popped up the other day to see it for myself. Well, It didnt do anything for me in the way of feel it in the seat of your pants HP increase. Maybe my car was never filled up with 87, who knows. My car was driven by my dealership from bowling green ohio to pittsburgh then filled up again by the dealer before delivery. I doubt they put 93 in it for both fill ups.

There is enough video and timing evidence to make a determination. Plus the GM Service Bulletin. Plus tuners who are seeing the car stuck on the low table. Before I did the original fuse pull that blew this wide open I had timed my car well over 100 times. The improvement was .8 secs all the way around immediately. Believe me, I'm one of those scheptics on just about everything. I had to fight Scott when he called and told me to try it becasue he'd seen it on a thread where a tuner did it to make sure the ECU was factory booted. And I figured it was just another fruitless attempt at fixing what I knew was a problem. I had tried everything including disconecting the battery. My original dyno sheets posted in the thread show the low power before the fuse pull. But more importantly the low torque.

The tuners were wondering why the hell it was running so rich. They even unplugged the battery to try and reset the ECU. When I left that first day they were saying that something is wrong to be running so rich.

After the fuse pull it was perfectly normal with the added power and torque.

Don't forget that GM sent engineers down here to Bama to look at one of our cars and found the problem. When they left they had Scotts car running right. Between that visit and the TSB is when we discovered the fuse pull.

[Sven59]

Tried it last night and noticed a definite improvement. Nothing scientific of course.

[hognutz]

Did the fuse pull. Seems to have more grunt, tires beak loose easier now. Even my wife asked if I did something to the car cause she said she was spinning the tires evertime she took off now.

the female test is 100% accurate. if she notices something it is dramatic ha ha.

[PQ]

Best way to do it is to time it. But the noticeable difference that is constantly reported is awesome.

For those that see no improvement I'd say you are lucky to have not needed it.

[OldJedi]

Originally Posted by PQ

It's similar to rebooting a computer or device that is messign up. It boots back up with the factory defaults or defaults that have been intentionaly changed.

There is enough video and timing evidence to make a determination. Plus the GM Service Bulletin. Plus tuners who are seeing the car stuck on the low table. Before I did the original fuse pull that blew this wide open I had timed my car well over 100 times. The improvement was .8 secs all the way around immediately. Believe me, I'm one of those scheptics on just about everything. I had to fight Scott when he called and told me to try it becasue he'd seen it on a thread where a tuner did it to make sure the ECU was factory booted. And I figured it was just another fruitless attempt at fixing what I knew was a problem. I had tried everything including disconecting the battery. My original dyno sheets posted in the thread show the low power before the fuse pull. But more importantly the low torque.

The tuners were wondering why the hell it was running so rich. They even unplugged the battery to try and reset the ECU. When I left that first day they were saying that something is wrong to be running so rich.

After the fuse pull it was perfectly normal with the added power and torque.

Don't forget that GM sent engineers down here to Bama to look at one of our cars and found the problem. When they left they had Scotts car running right. Between that visit and the TSB is when we discovered the fuse pull.

Thanks PQ

[BAD ZL1]

Is this fuse pull just for resetting things if the car had low octain fuel in its early days? I remember a post that Fbodfather made regarding disconnecting the battery after breakin period if you drove it lightly during breakin. Something about waking the car up from the light driving during break in. Are these 2 sepearte issues? Im confused.

Thanks

[PQ]

Originally Posted by BAD ZL1

Is this fuse pull just for resetting things if the car had low octain fuel in its early days? I remember a post that Fbodfather made regarding disconnecting the battery after breakin period if you drove it lightly during breakin. Something about waking the car up from the light driving during break in. Are these 2 sepearte issues? Im confused.

Thanks

If he said that then he was mistaken. It needs to be the fuses. Unless something changed.

But, yes, if you do the GM break in then you should do the fuse pull imo. Resets the ECU to defaults for some instant ECM learning curve.

[BAD ZL1]

OK, that leads to my next question, would it be a benefit to drive the car hard after the fuse pull to set its learning curve to agressive driving? If we slow poke around town AFTER the fuse pull, wont it learn the slow poke curves all over again? Sorry I sound so dumb on this issue, but I am. Thanks for your advice.

[PQ]

Originally Posted by BAD ZL1

OK, that leads to my next question, would it be a benefit to drive the car hard after the fuse pull to set its learning curve to agressive driving? If we slow poke around town AFTER the fuse pull, wont it learn the slow poke curves all over again? Sorry I sound so dumb on this issue, but I am. Thanks for your advice.

Perfectly leigt question.

I am a scheptic of the 'ECU learns how you drive' thing.

BUT, IF it truly does then look at it like resetting your MPG meter. If you have 500 miles on your MPG meter then it's hard to get it to a change in mpgs. But if you reset it then it changes instantly. The more miles the longer changes will register.

That's the best way I can describe it.

[BAD ZL1]

Originally Posted by PQ

Perfectly leigt question.

I am a scheptic of the 'ECU learns how you drive' thing.

BUT, IF it truly does then look at it like resetting your MPG meter. If you have 500 miles on your MPG meter then it's hard to get it to a change in mpgs. But if you reset it then it changes instantly. The more miles the longer changes will register.

That's the best way I can describe it.

Got it, thank you....When I do my oil change at 1500 (next week) I will do the fuse pull as well...

[AKA]

One thing I noticed since this fuse pull is I get the 1 to 4 shift thing again. I haven't had that happen to me in a long time but its back. Maybe this thing does learn driving habits. Also my car tapped like a diesel at times and that's gone now. Dealer told me it was injector noise so I believed them. Well my injectors aren't making any noise now. Hmmmmmm what would a fuse pull do to fix that?

[firecross91]

Did the fuse pull. Then ran it a few miles. Does seem to have a bit more grunt.