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that doesn't look great to be honest. I'd continue to watch it... especially under a heavier load.

It sounds like you got a miss other than that.. have you done the simple things? Wires/...

Does it cool at speed? If so it might be a fan

Have a good A/C tech put the system on a vacuum, check for leaks, refill with proper amount.

It sounds like you have another issue to be honest. If you diagnose a bad fan clutch which is computer controlled on these. Than I would do electric fans because of the cost replacing the stock...

Just to be clear.. i wasn't referring to anything min airflow related.. I would be sure that forcing it in speed density or open loop improves or doesn't change the situation. Maybe retest. It's...

Your post sounds like a non native english speaker so there might be something lost in translation.

A ZL1 has two IAT sensors. You want to pay attention to IAT2 for a ZL1. That will tell you if...

Where. what timestamp is the car surging?

I'm surprised this feels good at WOT. It has very little timing in it.

Is the surging better if you forced open loop? Is it better if you force...

sure but better to ask questions here. might help someone else in the future.

when adding a the pid search Short term idle trim and long term...

That should find it for you. It will be in engine - idle xxx

It doesn't look like he has that peak intentionally.. like he's tuning for the lean spot you are seeing..

Rather it looks like the harsh boundary edges when the RPM/MAP boundary tables could use...

yes.. computer controlled electroviscus clutch. They have problems.. usually lock up when they go back. But i assume it could go the other way.

I'd do electric fans if it was confirmed bad. ...

If I do 100 cars I might touch idle airflow pids on 1. Most people who go into that are masking other problems.

Fueling, the fueling as the engine decelerates, and timing are key for a good...

The fins will get blocked by debris. Externally.. not internally.

FIC did that. Among others.. It comes after they refit/redrill/reoriface whatever to a stock injector.

But both of us have asked you to verify fuel pressure under heavy load and I haven't seen a...

After the changes I recommenced you would need to go back over the tune.

Again I'd be wary of any map sensor that wasn't an OEM GM part.

I'd encourage you to look into EFIconnection.com This is a complicated wheel to re-invent and he's already done most of the hard part.

It's been a long time since I've seen one.. but a injector that drips will cause a hard start.

I don't know where we are at.. have you mechanically verified fuel pressure while trying to crank.

P0036 - HO2S Heater Control Circuit (Bank 1, Sensor 2) (Pending, Current)
P0050 - HO2S Heater Control Circuit (Bank 2, Sensor 1) (Pending, Current)
P0056 - HO2S Heater Control Circuit (Bank 2,...

thank you..

For me I used to be pretty guarded on what I know. I mean almost all of it came at the expense of fighting some problem here at the shop.

But I am/was involved in another...

Get a log with all the things we asked for earlier.

It could be that you are fast enough for 6th gear but not 6th gear locked up. The difference between the two might have you thinking its slipping.

When I do a A6+ with a loose converter I...

Any axis that has that little underline is editable

IMHO yes.. cost/hp for a good tune even on a bone stock car is on par or better than the return you get for headers.

They are doing this just to get the shift feel they want. IMHO they do a bad job of it... well better now days but when 6l80's first came out the programming was terrible and none of the shifts...

yes but also..the brake signal needs to be hooked up in swaps. Without it TCC lockup will be screwy... like unlock until 5 % or more.

the brake signal is opposite to what you would think. It...

you likely have something else going on. Has the condenser been blocked by dirt/sand? common from where I'm from.