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I'm not trying to offend you. Just sharing personal/professional experience.

The PCM not returning to 0% shouldn't have anything to do with it being at 0.7+. Its more that it hasn't returned to...

I wouldn't worry about it.

This is the exact reason why people filter out fast pedal movements when tuning fueling (VE or MAF)

You can get a successful TPS reset way up into the .7v range.

Usually when you see the TPS % get stuck high its because the throttle cable is sticky. Or there are some aftermarket throttle...

You can remove the timer and the RPM delay. They aren't needed. This is a good spot to make a big difference on these.


Adjust the TPS and MAP qualifiers so that it is only getting to PE at...

You will always have a rich/lean tip in or out reading. The engine will be running behind what you already injected. This looks reasonable.

Do you actually feel a hiccup or something?

I lower all the LS3 GMPP 525. I think they are on REV 8 now. This might all be old issues. Who knows.

Either that's been fixed or its limited to one particular REV. I don't have either of those issues. I'm not kidding when I've said i've done an absolute TON of them. I did 8-10 Track attack...

Yep, that doesn't work and again its not a good idea either.

The NA E67 LS2 CTSV is the generation prior to LSA. 06-07?? I can't remember exact year range now.

You can't just write entire one of these ECM's. It's also not a good idea to copy from one OS to another. A good example of why would be how some have a ECT Idle min airflow multiplier of .25...

very common mistake on hotrods.

When you have this problem and there is no maf on the car it gets super pissed when you try to crank it after a battery disconnect.

I use a template to setup GEN 3-4 in SD. If someone has a...

That's right.. That's why most experienced tuners don't mess much with AFR.

It could be on Propane and if lambda = 1 than it is stoich.

IF you do the basic diag, plug wires, plugs, etc. You can try moving injectors to see if the miss follows. If all the basics check out than it will point to a cam with some wiped lobes.

Post a log. Include some wide open throttle data in the log.

It's going to need VVE tuning.

No fuel trims, looks very rich. Your going to be fighting that trying to make it idle.

You would need GM reprogramming software to try this. HPTuners can not do that.

145174

You can see what I'm talking about here.

I tune GEN 3- 5 with this thing daily. So I try to make my scanner super dynamic. You will have better scanner performance if you only have...

I've not had that issue where a SD car wants to start with MAF in a long long time. There must be something about how I'm failing the MAF.

I'm very aware of the issue. GTO's always seemed worse...

Even though this is a PFI motor it should really go in the GEN 5 section.


If this is a PD style blower magnacharger, LT4, etc. You should look into getting a SCIAP sensor on it. It will fix...

Hey Robert. There are two brake switches.. One that is normally open that runs the lights. The other is normally closed and will keep the torque converter from locking especially off the gas in...

You can make another graph tab and break up how many you have in one. Go layout - add to lay out- graphs. I have 4 separate tabs of graphs on mine.

Looks like VVT was deleted? If so the cam tables need to be zeroed out and the VVE modifiers for camshaft movement need to be zeroed out.

The VVE and the timing are a mess.

Thats going to be a hard job for a new person.

You'll want to read up on speed density tuning VVE with this cam. Might not be a bad idea to get a start up tune from a seasoned tuner.

You should stop working with AFR. Switch to EQ ratio

All O2 sensors, narrrow band or wideband are looking for a stoich burn. They don't actually report back 14.1/1 etc.

A well tuned E85 car...