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The values in the PE throttle table arent direct pedal percentages.

15% PE is around 47% pedal, and 5% PE is around 30% pedal.

You need to be in PE earlier. Either put the whole table to 5%, or...

All good. Yeah not much happening at 35 seconds on the dot.

Either way, airflow models are definitely lean around there.

There would only be a small window for this to happen. Not enough...

I'm going off the latest log posted, screenshots attached.

Can see it's holding a few pounds of boost until it gets above 2500rpm, then boost starts climbing and spiking. No enrichment.

Just...

I think the root cause is just your PE throttle enable is too high. The value used isn't a direct correlation to TPS, it's throttle area.

You're not at enough throttle to enter PE, and then BE...

Edited my previous post, but I'll put it here instead:

EDIT: Separate issue, but you most likely have the same lean problem a lot of us have. Your trims are adding up to +14% in the 2500-2800rpm....

You're running the HPT 2bar OS, and boost enrichment hasn't been changed from 1.00.

Boost enrich is set to enable at 110kPa MAP, and it's still commanding stoich.

I made some changes to PE and...

I watched this video after you mentioned it.

False alarm, there is no lean spike! None of us have a lean spike!

He was certainly dismissive of your comments. To the point of even denying the...

sgod1100, myself, and most of the other gentlemen here are M6 trans. I believe.

I can go WOT from 1000rpm, and lean spikes show up the same.

Ive currently got them ?zeroed?. Theyre not all zero, but ive removed the coefficients, so to speak.

All MAP and TPS are zero. Current and Old are zero. Corrected is zero. Base is 1.

Ive tried...

Its hard to keep track, but its been narrowed down by members here.

Problem exists in blended, MAF only (not possible, but anyway), VVE SD, 2Bar SD.

Problem exists on an LS9 ZR1, stock...

I was running the VVE before I switched to 2Bar OS, still SD. I had more interpolation between the peaks, like a little hammock, not as dramatic. It was just harder to get the fuelling right, adding...

Heres an example of the VE and a snap of log.

AFR target a little lean here, but can see the massive peaks needed to keep the AFR on track.

Cylinder airmass shoots up as a result, but car...

Im sure you wouldnt mind 100 pages of hijacking, if it lead to an answer for us all! ;)

I think a fix might involve parting with some dollars. Getting rid of the FSCM for starters.

With all the...

Very nice!

Just a few questions, both for the lean spots, and if I did this myself at some point..

- Is the stock FSCM completely removed/unplugged? And the Vaporworx controller is effectively...

Just the one, 0033 I think. Could always leave the solenoid assembly installed and electrical connected, just not have the hoses connected to bypass or boost port.

Yeah I removed the whole solenoid assembly, left the electrical tied out of the way.

Needed better access around that area to run some hose, and thought it?s better sitting in a box than gathering...

Yeah not much change to general drivability, just takes less pedal to get all the air going through the rotors. The vacuum drops a lot quicker at the SC port.

Still operates the same, idle and...

Not sure about the pressure on the other side. I guess the internal diaphragm is seeing -80kPa of vacuum regularly, sucking it out.

Once I hit boost, its only going to see +110kPa pressure pushing...

Sorry man haha. Theres not much I havent tried at this point.

I did try it fully closed, air through rotors all the time.

Same result, no change to lean spots, just dramatically increased IAT...

I thought same as you.

Mine is now fully disconnected from the boost protection, and electrical.

Re-routed the vacuum side to run from the SC boost reference port. Still gets vacuum at light...

Unfortunately tried all that, many times over.

Can set the pressure to 300kPa, 500kPa, high flow full time, 100% pump DC full time, and anything in between.

Shows up the same every time.
...

Good idea! But doesnt look possible, through HPT anyway.

Theres not that much we can modify in the FSCM. Thankful enough that HPT provide what they have, but theres no option for disabling any...

Cant see the tune right now, but AFR looks good. A small torque loss around 2500, then spiking up. Pretty much how the engine torque shows in the scanner, but this is on a dyno? Could be a sign of...

A while back I went through all the dyno sheets posted over on the camaro5 and ctsvowners forums. Just the ones in the 'dyno' threads. Very common, can see the issue on a lot of the cars. Hard to...

Perfect! Great info!

So you had the problem stock exhaust, but injectors added.

Myself and others had the problem with stock injectors, but exhaust/intake mods.

Seems like it is pointing to...