LS3 Gold Blade TB on a LC9 Idle Issue

[grandamle91]

I have a gold blade tb 19420707 on my 2010 Suburban 5.3 and have a issues with the idle randomly bouncing around. It's usually just 100 rpms or so enough to hear it. I've change the Idle ETC Area Scalar from a 10 vette with a 6.2

[edcmat-l1]

Might wanna try swapping over the idle rpm PIDs from a Corvette or Camaro.

[grandamle91]

they are the same

Screenshot (4).png

[edcmat-l1]

they are the same

Screenshot (4).png

I see it looks like you copied over a Vette file. If you compare to a Camaro, there are several tables that are different. One of my 2010 Vette files there were 1 or 2 different so I pulled one of the HPT repository and it looks like you copied that file over.

I'd suggest maybe going back to your stock PIDs and see how it acts. It might work fine just setting the scalar.

Another thing is, you softened up the idle spark control over/under tables. When you do that, it throws more of that responsibility back on the throttle blade. Might want to put those back to stock.

[grandamle91]

I'll try it again, it was worse with the stock lc9 pids, the under over weren't changed

[edcmat-l1]

I'll try it again, it was worse with the stock lc9 pids, the under over weren't changed

I compared it to another OE file for 2010 5.3 and your over/under tables are definitely softer. The timing line graph in your data log you can tell they're pretty soft. Making them more aggressive should make the blade more stable.

[edcmat-l1]

Sure does look like they were changed last night around 8 pm.

Actually they've been changed at least a couple times in just the past couple days.

[grandamle91]

I thought I switched it back to stock. Got that changed back, no difference. Only way I got it to idle smoothly was dropping the idle spark down to 13, but still randomly start to struggle to find a steady state

[edcmat-l1]

I thought I switched it back to stock. Got that changed back, no difference. Only way I got it to idle smoothly was dropping the idle spark down to 13

You or somebody has made extensive changes to the entire calibration. The only thing you posted about in your original post is that you have a gold blade LS3 throttle body. That's an insane amount of changes for a throttle body.

Without knowing the rest of the build it's difficult to say what you got going on. It leads me to believe you're just too far "out in the weeds".

Softening up the spark over/under tables will net a smoother idle, especially if you have a cam with some overlap. The side effect being the throttle then thinks it needs to move more to control your idle. Making the over/under tables more aggressive, or leaving them stock as opposed to softening them, will make the idle more choppy but it'll keep the blade from trying to control idle speed, and ending up with the condition you're in. Pick your poison.

[grandamle91]

guess im going back to the lc9 tb. idle fine on that

[Alvin]

I'd put everything back to stock and then try it with the throttle body. You normally don't have to make many changes for it at all. Can get by with a scalar adjustment only.

[grandamle91]

It's as stock as it can go

[Alvin]

You or somebody has made extensive changes to the entire calibration. The only thing you posted about in your original post is that you have a gold blade LS3 throttle body. That's an insane amount of changes for a throttle body.

Without knowing the rest of the build it's difficult to say what you got going on. It leads me to believe you're just too far "out in the weeds".

Softening up the spark over/under tables will net a smoother idle, especially if you have a cam with some overlap. The side effect being the throttle then thinks it needs to move more to control your idle. Making the over/under tables more aggressive, or leaving them stock as opposed to softening them, will make the idle more choppy but it'll keep the blade from trying to control idle speed, and ending up with the condition you're in. Pick your poison.

It's as stock as it can go

???????????????????????????? doesn't look that way

[edcmat-l1]

???????????????????????????? doesn't look that way

Yeah it's not.

It's kind of irritating you get half stories, half mod lists, posters claiming something hasn't been changed when clearly it has. Then when you make a suggestion all you get it "I tried that and same thing". OK whatever.....

[grandamle91]

Don't know how any stocker it can get, but ok


2010 Chevy Suburban 5.3 12636005 e85 Trans Tuned.hpt

[edcmat-l1]

Judging by the change log you just put it back to stock before posting it.

Where is the data log of it doing the same thing with it all put back to stock? At this point even if you posted one, I'd find it hard to believe you.

[grandamle91]

Then stop replying, I already said I figured it out. It didn't like the stock timing at 20. Doesn't hunt with it set at 13

[gtstorey]

I thought I switched it back to stock. Got that changed back, no difference. Only way I got it to idle smoothly was dropping the idle spark down to 13, but still randomly start to struggle to find a steady state

guess im going back to the lc9 tb. idle fine on that

Then stop replying, I already said I figured it out. It didn't like the stock timing at 20. Doesn't hunt with it set at 13

[grandamle91]

No Longer Responding. I remember why I stopped coming to this forum.

idle 10 timing.hpl
idle 20 timing.hpl
idle 10 timing.hpt

[edcmat-l1]

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